US8571479B2 - Short-range wireless communication - Google Patents

Short-range wireless communication Download PDF

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US8571479B2
US8571479B2 US13/656,502 US201213656502A US8571479B2 US 8571479 B2 US8571479 B2 US 8571479B2 US 201213656502 A US201213656502 A US 201213656502A US 8571479 B2 US8571479 B2 US 8571479B2
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data
wireless
signal
power
link
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US20130045688A1 (en
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Raja Banerjea
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Marvell Asia Pte Ltd
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Marvell World Trade Ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/38TPC being performed in particular situations
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/38TPC being performed in particular situations
    • H04W52/50TPC being performed in particular situations at the moment of starting communication in a multiple access environment
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/24Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/06TPC algorithms
    • H04W52/08Closed loop power control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/38TPC being performed in particular situations
    • H04W52/383TPC being performed in particular situations power control in peer-to-peer links
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/18TPC being performed according to specific parameters
    • H04W52/24TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/245TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account received signal strength
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • H04W76/14Direct-mode setup

Definitions

  • Another method for transmitting, from a first wireless-communication-capable device, a first signal at a first power and first modulation, the first signal indicating a request to use a transmission medium for a duration of time; and responsive to receiving a response indicating that the transmission medium is free to use for the duration of time or not receiving a response for a period sufficient to indicate that no potentially interfering device received the first signal, transmitting, from the first wireless-transmission-capable device, a second signal at a second power, a second modulation, and for less than or equal to the duration of time, the second signal transmitting data to a second wireless-communication-capable device, the second power being a lower power than the first power, and the second modulation being different than the first modulation.
  • SoC system on chip
  • the SoC configured to receive a link-setup request, the like-setup request requesting transmission of a data signal at a lower-than-nominal power; transmit a link-setup response in response to receiving the link-setup request, the link-setup response indicating a current transmit power; receive a desired data-signal transmit power in response to the link-setup response; transmit a request to use a transmission medium for a duration of time; and transmit, responsive to receiving an indication that the transmission medium is free to use for the duration of time or not receiving an indication for a period sufficient to indicate that no potentially interfering device received the request to use the transmission medium for the duration of time, the data signal at the desired data-signal transmit power for less than or equal to the duration of time.
  • FIG. 1 is an illustration of an example operating environment that is configured to enable short-range wireless communication.
  • FIG. 2 is a graph showing example communication effectiveness relative to proximity between wireless-communication devices.
  • FIG. 3 is a method for controlling transmit-power of devices during short-range wireless communications.
  • FIG. 4 illustrates example devices and transmission areas in which a lost-node problem can potentially occur in the context of low-power wireless communications.
  • FIG. 5 is a method for addressing a potential lost-node problem.
  • FIG. 6 illustrates an example system-on-chip (SoC) environment.
  • SoC system-on-chip
  • the present specification describes techniques and apparatus that enable wireless devices to communicate effectively at short ranges.
  • the transmit power of a transmitting device is reduced to permit a receiving device to demodulate a signal.
  • a first device transmitting signals at lower power to a second device can cause a third device to be unaware of the transmission between the first device and the second device.
  • a third device e.g., when a third device (a node) is unaware of another device (the “lost node”), the third device may transmit a signal even if the lost node is also transmitting.
  • the third device may transmit because it is not aware that other devices are using the same transmission medium. This transmission by the third device may interfere with the receiver of the receiving device or simply obscure the transmission of the “lost node”.
  • the present specification also describes techniques and apparatus that enable a device to determine that a low-power transmission is being or will be made. By so doing, devices can communicate effectively at short range without interference from other devices.
  • FIG. 1 illustrates an example operating environment 100 .
  • the example operating environment 100 includes wireless-communication-capable devices 102 , all of which are capable of transmitting and receiving wireless communications, such as those following wireless LAN or Bluetooth communication protocols.
  • Devices 102 are shown to include a cellular phone 104 , a set-top box 106 , a television computing device 108 , a desktop computing device 110 , a laptop computing device 112 , and a handheld tablet computer 114 .
  • each of devices 102 includes a wireless transmitter 116 , a wireless receiver 118 , and a short-range wireless communicator 120 .
  • Wireless transmitter 116 is capable of transmitting a wireless-communication signal according to one or more communication protocols, such as those for a wireless LAN (Local Area Network) or a wireless PAN (Personal Area Network). These protocols may include those of the IEEE 802.11 and Bluetooth families of protocols.
  • Wireless receiver 118 is capable of receiving a wireless-communication signal according to one or more communication protocols, such as those noted for wireless transmitter 116 .
  • Wireless transmitter 116 and wireless receiver 118 may be separate (shown) or combined (often called a transceiver, not shown) and may be hardware combined with or separate from software.
  • Wireless transmitter 116 and wireless receiver 118 are capable of modulating and demodulating a wireless signal, respectively.
  • these various wireless-communication protocols may enable communication less effectively at short ranges, such as those of less than one meter. Even receivers that are relatively capable of handling high-power transmissions (and thus typical short-range transmissions) are often susceptible to some loss of effectiveness at short range.
  • graph 200 of FIG. 2 which shows example communication effectiveness relative to proximity between wireless-communication devices.
  • Graph 200 shows example communication effectiveness for current wireless LAN communication protocols of 802.11 and Bluetooth for some devices. Here the effectiveness of communication drops at about 0.4 meter for 802.11 and 0.25 meter for Bluetooth.
  • Effectiveness of communication is shown as throughput in megabytes per second at 202 , effectiveness for 802.11 is shown relative to meters proximity at 204 , effectiveness for Bluetooth is shown relative to meters proximity at 206 , with proximity in meters (not to scale) shown at 208 .
  • Short-range wireless communicator 120 (also referred to as “communicator 120 ” for brevity) is capable of enabling a wireless device to communicate effectively at short range.
  • Communicator 120 may act independently or in conjunction with various other entities, such as wireless transmitter 116 and wireless receiver 118 .
  • Communicator 120 may be separate from or integral with other entities of device 102 as well, such as by being firmware integrated into a System-on-Chip (SoC) having or communicating with wireless transmitter 116 and wireless receiver 118 .
  • SoC System-on-Chip
  • communicator 120 includes a set of computer-executable instructions stored on computer-readable media 122 . When executed by one or more processors 124 , device 102 acts according to those instructions.
  • Communicator 120 is capable of making decisions and performing one or more tasks to enable devices to effectively communicate wirelessly at short range. In some embodiments this also includes addressing a “lost-node” separately from or in conjunction with lowering transmission power as described below in the sections entitled “Example Power-control Process” and “Lost Node”, as well as elsewhere herein.
  • FIG. 3 depicts a method 300 for controlling transmit-power control for short-range wireless communications.
  • a data-receiving device here laptop computing device 112
  • a data-transmitting device here cellular phone 104 .
  • these two devices are examples of device 102 of FIG. 1 , and that both may include the elements shown for device 102 of FIG. 1 (e.g., communicator 120 ).
  • actions performed by a data-transmitting device are shown at 302 and actions of a data-receiving device are shown at 304 , both separated by a vertical dashed line.
  • the devices 104 and 112 shown are for illustration purposes, and are not intended to limit the types of data-transmitting and data-receiving devices. Note also that communications are made between both devices, and thus both transmit and receive.
  • the data-transmitting device is the device that intends to transmit information over a wireless medium to the data-receiving device following link setup between the devices, described below.
  • a data-receiving device transmits a link-setup request for a data-transmitting device to transmit at a lower-than-nominal power.
  • the data-receiving device may transmit through various wireless local or personal area networks and using various protocols and modulations, such as those of the IEEE 802.11 family of protocols or the Bluetooth family of protocols to name a few.
  • the data-receiving device may transmit the link-setup request using a different modulation or protocol than intended for future data communications.
  • One such example is transmitting the link-setup request using robust modulation like direct sequence spread spectrum techniques (DSSS). Many of these robust modulations aid in setting up a communication link though they often have lower data throughput than the modulation used in future data transmissions.
  • the link-setup request may also be sent at a lower-than-nominal power to reduce possible interference or saturation by the link-setup request.
  • the data-transmitting device receives the link-setup request and responds with a link-setup response indicating a current transmit power of the data-transmitting device.
  • the data-transmitting device also provides other information in the link-setup response, such as a link margin associated with the data-transmitting device.
  • Link margin is a measure of the range of powers that the data-transmitting device may effectively demodulate a received signal.
  • the data-receiving device receives the link-setup response from the data-transmitting device.
  • This link-setup response indicates the current transmit power of the data-transmitting device at which the link-setup response was transmitted.
  • This response is received at a particular power by the data-receiving device.
  • the data-receiving device is able to determine a relationship between transmit power and received power.
  • the receiving device may also receive the link margin associated with the data-transmitting device.
  • the data-receiving device determines a desired data-signal transmit power and transmits this desired data-signal transmit power to the data-transmitting device. This and other steps of this method may be performed by short-range wireless communicator 120 , as well as wireless transmitter 116 and wireless receiver 118 , all of which are shown in FIG. 1 . Note that both the data-receiving device and the data-transmitting device may include these entities.
  • desiredtransmitPower is the desired transmit power at which the data-receiving device requests that the data-transmitting device transmit the data signal.
  • the TPCresponseTxPower is the current transmit power of the data-transmitting device.
  • RSSI stands for “Received Signal Strength Indication”.
  • the RSSI Rx is the received power of the received response.
  • the RSSI desiredRate is the desired received power.
  • the desired power at which the data-signal is received is often based at least in part on the capabilities and configuration of the wireless receiver. Some wireless receivers receive data signals best at a particular power different from other wireless receivers, either independent of or based on the particular modulation of the data signal.
  • the data-transmitting device receives the desired data-signal transmit power and transmits a data signal at the desired data-signal transmit power, which is received at the data-receiving device shown at block 316 .
  • a link for communication is complete for data transmission based on the management transmissions communicated at blocks 306 through 312 and part of 314 .
  • the data signal will be received by the data-receiving device having less than a maximum throughput for the modulation at which the data signal is sent. In such a case the method 300 proceeds along optional paths to blocks 318 and 320 as well as repeating some other actions of method 300 .
  • the data-receiving device at block 316 receives signals at a received power.
  • Communicator 120 may then determine at block 318 that the received power has a less-than-maximum throughput for the modulation. Responsive to this determination and based on the received power of the data signal, communicator 120 determines a second desired data-signal transmit power at block 320 . Communicator 120 may do so in a manner similar to the manner in which the first desired data-signal transmit power was determined.
  • the data-receiving device transmits this second desired data-signal transmit power also at block 320 .
  • the data-transmitting device may use this information to transmit the data signal at the second desired data-signal transmit power at block 314 . Note that these blocks may be repeated again if the data-receiving device determines that the received power is still at a less-than-maximum throughput.
  • the data-receiving device may do so at block 320 using a directed probe response frame, such as those used in the IEEE 802.11 family of protocols.
  • This method may be responsive to either the data-receiving device, the data-transmitting device, or some third-party device determining that the nominal transmission power is potentially too high for maximum throughput between the data-receiving device and the data-transmitting device.
  • One such case is when the data-receiving device determines that a data signal or setup signal from the data transmitting device is received at a power that does not permit a maximum throughput for the modulation of the signal.
  • the data-receiving device may determine this through interference or saturation at its wireless receiver 118 . It may also be determined by the data-transmitting device through delays or other information learned from communications from the data-receiving device or a third-party device.
  • the communication link established as part of method 300 can optionally be maintained, such as with closed-loop or open-loop control.
  • open-loop control include ones that determine whether there has been a change in the received data-signal power and, responsive to this change, change a transmit power of the data-receiving device.
  • communicator 120 may use an increase or decrease in received power of a data signal from the data-transmitting device to extrapolate that the data-receiving device will need to increase or decrease its transmission power in a similar manner.
  • One case in which this occurs is when a device moves closer to or further away from the other device. In the example above a user may move the cellular phone 104 or the laptop computing device 112 .
  • newtransmitPower is the new (second or later) desired transmit power at which the data-receiving device requests that the data-transmitting device transmits the data signal.
  • the oldtransmitPower is the previous transmit power desired and requested. This is also the most-recent previous transmit power if the newtransmitPower is a third or later requested power.
  • the oldRSSI is the previous (or in some cases average also) received power.
  • the newRSSI is the current received power (or in some cases an average also).
  • Examples of closed-loop control include periodically re-performing some steps of the method 300 to determine a new desired data-signal transmit power or performing these steps responsive to determining a change in a throughput of a data signal. These steps include those performed at blocks 306 , 310 , and 312 and/or 318 and 320 .
  • FIG. 4 illustrates example devices and transmission areas in which a lost-node problem can potentially occur in the context of low-power transmission.
  • the first two devices are within a low-power transmission area 402 . These two devices are low-power-area transmitting device 404 and low-power-area receiving device 406 .
  • the second two devices are within a higher-power transmission area 408 . These two devices are higher-power-area transmitting device 410 and higher-power-area receiving device 412 .
  • area 402 overlaps with area 408 .
  • This overlap illustrates that a device in area 408 may potentially transmit a signal that interferes with signals in area 402 . Such interferences are possible if a device in area 408 is not aware of low-power transmission in area 402 .
  • FIG. 5 depicts a method 500 in an example implementation in which a device can address a potential lost-node problem.
  • a device intending to transmit at low power transmits a signal requesting a transmission medium for a duration of time.
  • This signal may be sent having a robust modulation signal to increase the likelihood that a device (e.g., an Access Point or some device that may transmit) will receive and understand the transmission.
  • the signal may also or instead be sent at a high or nominal power to increase the likelihood that a device that may not notice a future low-power signal will notice and understand this signal.
  • communicator 120 may determine the duration of time based on how long the data will take to transmit using the medium and at a particular low power. This duration may be for a particular amount or all of the data. These particular amounts may be as little as some number of data packets that in total are not sufficient to transmit all of the desired data. This data can be as small as a single data packet, in which case the duration of time is short. In such a case the method 500 may be repeated for each packet, packets, or other particular amount of data.
  • cellular phone 406 intends to communicate at low power with desktop computing device 404 , such as to sync up cellular phone 406 's calendar with desktop computing device 404 's calendar.
  • cellular phone 406 (using communicator 120 and wireless transmitter 116 of FIG. 1 ) transmits a signal requesting a transmission medium so that the device can transmit a signal at low power.
  • cellular phone 406 transmits with wireless transmitter 116 and according to IEEE 802.11, with a robust modulation, and at nominal power. Examples of such a signal include a Request To Send (RTS) packet and a Clear To Send-Self (CTS-Self) packet.
  • RTS Request To Send
  • CTS-Self Clear To Send-Self
  • the transmitting device either receives a response from one or more third-party devices indicating that the requested medium is free to use or does not. If no response is received, the device proceeds along the “No” path to block 506 . At block 506 , the device waits some time period sufficient to indicate that no other devices received the request at block 504 or otherwise indicate that the medium is fee to use. After this wait period, the device proceeds to block 508 .
  • the device transmits at low power and for up to about the duration of time requested at block 504 . If, however, the device receives a response indicating that the requested transmission medium is free to use, the device follows the “Yes” path to block 508 without a wait period.
  • a response may include a Clear To Send (CTS) packet from other devices.
  • CTS Clear To Send
  • the device may optionally proceed to block 510 to repeat the process.
  • the duration of time may be for a particular amount of data. If this amount of data is broken into pieces, or is small and discrete, such as a packet of data, then multiple pieces and multiple durations of time may be transmitted and requested.
  • wireless receiver 118 of cellular phone 406 receives a signal from a device or access point (e.g., tablet computer 410 ) indicating that the other device or access point is granting the transmission medium.
  • this signal in response to the request may be a CTS frame indicating that the medium is free to use.
  • the response may indicate that the access point has set its NAV to not use the transmission medium for the duration of time.
  • communicator 120 receives this indication (demodulated by wireless receiver 118 and passed to communicator 120 ) and proceeds to block 508 .
  • cellular phone 406 After receiving a response or waiting the period, cellular phone 406 transmits at low power (block 508 ).
  • cellular phone 406 's wireless receiver 118 receives the response indicating that the communication medium will not be used, after which communicator 120 permits cellular phone 406 's wireless transmitter 116 to transmit at low power to desktop computing device 404 for the duration of time. If the duration is for a piece rather than all of the data, the device may repeat, following block 510 , one or more parts of the method 500 .
  • the method of FIG. 5 may permit devices 404 and 406 to communicate at low power without interference from devices 410 and 412 . Note also that this method may enable either or both of devices 410 and 412 to avoid interference from devices 404 and 406 as well, such as when a low-power transmission from cellular phone 406 may interfere with a transmission (high or low power) from tablet computer 410 that is intended for receipt by laptop computing device 412 .
  • SoC 600 can be integrated with electronic circuitry, a microprocessor, memory, input-output (I/O) logic control, communication interfaces and components, other hardware, firmware, and/or software needed to run an entire device. SoC 600 can also include an integrated data bus (not shown) that couples the various components of the SoC for data communication between the components. A device that includes SoC 600 can also be implemented with many combinations of differing components.
  • SoC 600 includes various components such as an input-output (I/O) logic control 602 (e.g., to include electronic circuitry) and a microprocessor 604 (e.g., any of a microcontroller or digital signal processor). SoC 600 also includes a memory 606 , which can be any type of random access memory (RAM), a low-latency nonvolatile memory (e.g., flash memory), read only memory (ROM), and/or other suitable electronic data storage. SoC 600 can also include various firmware and/or software, such as an operating system 608 , which can be computer-executable instructions maintained by memory 606 and executed by microprocessor 604 . SoC 600 can also include other various communication interfaces and components, wireless LAN (WLAN) or PAN (WPAN) components, other hardware, firmware, and/or software.
  • I/O input-output
  • SoC 600 also includes a memory 606 , which can be any type of random access memory (RAM), a low-latency nonvolatile memory (e
  • SoC 600 may include wireless transmitter 116 , wireless receiver 118 , and short-range wireless communicator 120 (in either or multiple devices as noted above). Examples of these various components, functions, and/or entities, and their corresponding functionality, are described with reference to the respective components of the example environment 100 shown in FIG. 1 .
  • Communicator 120 in SoC 600 can be implemented as computer-executable instructions maintained by memory 606 and executed by microprocessor 604 to implement various embodiments and/or features described herein.
  • Short-range wireless communicator 120 may also be provided integral with other entities of the SoC, such as integrated with one or both of wireless transmitter 116 and wireless receiver 118 .
  • communicator 120 and the other components can be implemented as hardware, firmware, fixed logic circuitry, or any combination thereof that is implemented in connection with the I/O logic control 602 and/or other signal processing and control circuits of SoC 600 .
  • This specification describes techniques and apparatus that enable short-range wireless communication by reducing the transmission power of a transmitting device. This enables a receiving device to demodulate the signal without being interfered with by a too-powerful transmitted signal.
  • the techniques described herein also address “lost-node” problems that may arise in lower-power transmissions and in other cases where a node is not detected.

Abstract

The present specification describes techniques and apparatus that enable wireless devices to communicate effectively at short ranges. In one implementation, the transmit power of a transmitting device is reduced to permit a receiving device to demodulate a signal.

Description

RELATED APPLICATIONS
This application is a continuation of and claims priority to U.S. Utility Application Ser. No. 12/478,446, filed on Jun. 4, 2009, which in turn claims priority to U.S. Provisional Patent Application Ser. No. 61/079,635 filed Jul. 10, 2008 and U.S. Provisional Patent Application Ser. No. 61/061,977, filed Jun. 16, 2008, the disclosure of which are incorporated by reference herein in their entirety. This application is further related to PCT Application serial number PCT/US09/46289, filed on Jun. 4, 2009, and national stage filings including Chinese Application serial number 200980122587.0, filed on Dec. 15, 2010, European Patent Office Application serial number 09789754.0, filed on Dec. 16, 2010, Japanese Application serial number 2011-0513586, filed on Nov. 11, 2010, and Korean Application serial number 10-2010-7027891, filed on Dec. 10, 2010.
BACKGROUND
Devices that communicate wirelessly often do not communicate effectively at short range—e.g., a range less than 1 meter. A user wishing to sync a cellular phone with a laptop computer, for example, may find that neither communicates effectively—or in some cases at all—when the devices are close to each other.
SUMMARY
A method is described for transmitting, through a network, a link-setup request for a device to transmit at a lower-than-nominal power; receiving, through the network and from the device, a link-setup response indicating a current transmit power of the device, the link-setup response having been received at a received power; determining, based on the received power of the link-setup response, a desired data-signal transmit power for the device; and transmitting, through the network, the desired data-signal transmit power to the device.
Another method is described for transmitting, from a first wireless-communication-capable device, a first signal at a first power and first modulation, the first signal indicating a request to use a transmission medium for a duration of time; and responsive to receiving a response indicating that the transmission medium is free to use for the duration of time or not receiving a response for a period sufficient to indicate that no potentially interfering device received the first signal, transmitting, from the first wireless-transmission-capable device, a second signal at a second power, a second modulation, and for less than or equal to the duration of time, the second signal transmitting data to a second wireless-communication-capable device, the second power being a lower power than the first power, and the second modulation being different than the first modulation.
A system on chip (SoC) is also described, the SoC configured to receive a link-setup request, the like-setup request requesting transmission of a data signal at a lower-than-nominal power; transmit a link-setup response in response to receiving the link-setup request, the link-setup response indicating a current transmit power; receive a desired data-signal transmit power in response to the link-setup response; transmit a request to use a transmission medium for a duration of time; and transmit, responsive to receiving an indication that the transmission medium is free to use for the duration of time or not receiving an indication for a period sufficient to indicate that no potentially interfering device received the request to use the transmission medium for the duration of time, the data signal at the desired data-signal transmit power for less than or equal to the duration of time.
BRIEF DESCRIPTION OF THE DRAWINGS
The detailed description is described with reference to the accompanying figures. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The use of the same reference numbers in different instances in the description and the figures may indicate similar or identical items.
FIG. 1 is an illustration of an example operating environment that is configured to enable short-range wireless communication.
FIG. 2 is a graph showing example communication effectiveness relative to proximity between wireless-communication devices.
FIG. 3 is a method for controlling transmit-power of devices during short-range wireless communications.
FIG. 4 illustrates example devices and transmission areas in which a lost-node problem can potentially occur in the context of low-power wireless communications.
FIG. 5 is a method for addressing a potential lost-node problem.
FIG. 6 illustrates an example system-on-chip (SoC) environment.
DETAILED DESCRIPTION
Overview
    • As noted in the Background above, devices that communicate wirelessly often fail to communicate effectively at short range. At short range, a signal receiver in a device may be incapable of demodulating a strong wireless signal. For current wireless LAN communication protocols, such as IEEE 802.11, the range at which communication becomes less effective is at about one meter or closer. At even shorter ranges, such as 0.2 meter or less, many devices following this or other communication protocols may not be able to communicate at all.
The present specification describes techniques and apparatus that enable wireless devices to communicate effectively at short ranges. In one implementation, the transmit power of a transmitting device is reduced to permit a receiving device to demodulate a signal.
In some cases a first device transmitting signals at lower power to a second device, however, can cause a third device to be unaware of the transmission between the first device and the second device. Such a situation is referred to herein as a “lost node”—e.g., when a third device (a node) is unaware of another device (the “lost node”), the third device may transmit a signal even if the lost node is also transmitting. The third device may transmit because it is not aware that other devices are using the same transmission medium. This transmission by the third device may interfere with the receiver of the receiving device or simply obscure the transmission of the “lost node”. To address this potential problem as well as for other positive effects, the present specification also describes techniques and apparatus that enable a device to determine that a low-power transmission is being or will be made. By so doing, devices can communicate effectively at short range without interference from other devices.
In the discussion that follows, an example operating environment is described. Example methods are also described that may be employed in the example operating environment as well as other environments. These methods are followed by an example System-on-Chip (SoC) embodiment in which components of FIG. 1 may be embodied. In the discussion below, reference will be made to the environment by way of example only and, therefore, implementations described below are not limited to the example environment.
Example Operating Environment
FIG. 1 illustrates an example operating environment 100. The example operating environment 100 includes wireless-communication-capable devices 102, all of which are capable of transmitting and receiving wireless communications, such as those following wireless LAN or Bluetooth communication protocols. Devices 102 are shown to include a cellular phone 104, a set-top box 106, a television computing device 108, a desktop computing device 110, a laptop computing device 112, and a handheld tablet computer 114.
In this example environment, each of devices 102 includes a wireless transmitter 116, a wireless receiver 118, and a short-range wireless communicator 120. Wireless transmitter 116 is capable of transmitting a wireless-communication signal according to one or more communication protocols, such as those for a wireless LAN (Local Area Network) or a wireless PAN (Personal Area Network). These protocols may include those of the IEEE 802.11 and Bluetooth families of protocols.
Wireless receiver 118 is capable of receiving a wireless-communication signal according to one or more communication protocols, such as those noted for wireless transmitter 116. Wireless transmitter 116 and wireless receiver 118 may be separate (shown) or combined (often called a transceiver, not shown) and may be hardware combined with or separate from software. Wireless transmitter 116 and wireless receiver 118 are capable of modulating and demodulating a wireless signal, respectively.
Note that these various wireless-communication protocols may enable communication less effectively at short ranges, such as those of less than one meter. Even receivers that are relatively capable of handling high-power transmissions (and thus typical short-range transmissions) are often susceptible to some loss of effectiveness at short range. Consider graph 200 of FIG. 2, which shows example communication effectiveness relative to proximity between wireless-communication devices. Graph 200 shows example communication effectiveness for current wireless LAN communication protocols of 802.11 and Bluetooth for some devices. Here the effectiveness of communication drops at about 0.4 meter for 802.11 and 0.25 meter for Bluetooth. Effectiveness of communication is shown as throughput in megabytes per second at 202, effectiveness for 802.11 is shown relative to meters proximity at 204, effectiveness for Bluetooth is shown relative to meters proximity at 206, with proximity in meters (not to scale) shown at 208.
Short-range wireless communicator 120 (also referred to as “communicator 120” for brevity) is capable of enabling a wireless device to communicate effectively at short range. Communicator 120 may act independently or in conjunction with various other entities, such as wireless transmitter 116 and wireless receiver 118. Communicator 120 may be separate from or integral with other entities of device 102 as well, such as by being firmware integrated into a System-on-Chip (SoC) having or communicating with wireless transmitter 116 and wireless receiver 118.
In environment 100 of FIG. 1, communicator 120 includes a set of computer-executable instructions stored on computer-readable media 122. When executed by one or more processors 124, device 102 acts according to those instructions.
Communicator 120 is capable of making decisions and performing one or more tasks to enable devices to effectively communicate wirelessly at short range. In some embodiments this also includes addressing a “lost-node” separately from or in conjunction with lowering transmission power as described below in the sections entitled “Example Power-control Process” and “Lost Node”, as well as elsewhere herein.
Example Power-Control Process
The following discussion describes techniques that may be implemented utilizing the previously described environment. Aspects of the method may be implemented in hardware, firmware, software, or a combination thereof. The methods are shown as a set of blocks that specify operations performed by one or more entities and are not necessarily limited to the orders shown for performing the operations by the respective blocks.
FIG. 3 depicts a method 300 for controlling transmit-power control for short-range wireless communications. In this example implementation, a data-receiving device, here laptop computing device 112, is attempting to communicate wirelessly at short range with a data-transmitting device, here cellular phone 104. Note that these two devices are examples of device 102 of FIG. 1, and that both may include the elements shown for device 102 of FIG. 1 (e.g., communicator 120).
As illustrated, actions performed by a data-transmitting device are shown at 302 and actions of a data-receiving device are shown at 304, both separated by a vertical dashed line. The devices 104 and 112 shown are for illustration purposes, and are not intended to limit the types of data-transmitting and data-receiving devices. Note also that communications are made between both devices, and thus both transmit and receive. The data-transmitting device is the device that intends to transmit information over a wireless medium to the data-receiving device following link setup between the devices, described below.
At block 306, a data-receiving device transmits a link-setup request for a data-transmitting device to transmit at a lower-than-nominal power. The data-receiving device may transmit through various wireless local or personal area networks and using various protocols and modulations, such as those of the IEEE 802.11 family of protocols or the Bluetooth family of protocols to name a few. The data-receiving device may transmit the link-setup request using a different modulation or protocol than intended for future data communications. One such example is transmitting the link-setup request using robust modulation like direct sequence spread spectrum techniques (DSSS). Many of these robust modulations aid in setting up a communication link though they often have lower data throughput than the modulation used in future data transmissions. The link-setup request may also be sent at a lower-than-nominal power to reduce possible interference or saturation by the link-setup request.
At block 308, the data-transmitting device receives the link-setup request and responds with a link-setup response indicating a current transmit power of the data-transmitting device. In some cases the data-transmitting device also provides other information in the link-setup response, such as a link margin associated with the data-transmitting device. Link margin is a measure of the range of powers that the data-transmitting device may effectively demodulate a received signal.
At block 310, the data-receiving device receives the link-setup response from the data-transmitting device. This link-setup response indicates the current transmit power of the data-transmitting device at which the link-setup response was transmitted. This response is received at a particular power by the data-receiving device. With this information, the data-receiving device is able to determine a relationship between transmit power and received power. As noted in part above, the receiving device may also receive the link margin associated with the data-transmitting device.
At block 312, the data-receiving device determines a desired data-signal transmit power and transmits this desired data-signal transmit power to the data-transmitting device. This and other steps of this method may be performed by short-range wireless communicator 120, as well as wireless transmitter 116 and wireless receiver 118, all of which are shown in FIG. 1. Note that both the data-receiving device and the data-transmitting device may include these entities.
Short-range wireless communicator 120 determines the desired data-signal transmit power based on the transmit power at which the link-setup response was transmitted by the data-transmitting device, the received power of the link-setup response, and a desired data-signal reception power. As noted above the link-setup response indicated the transmit power and the data-receiving device determined the power at which link-setup response was received. Communicator 120 determines the desired data-signal transmission power with this information. In some cases communicator 120 also determines this based on the data-receiving device's link margin, hardware capabilities of wireless receiver 118, and/or the modulation that the data signal is intended to be transmitted. In one implementation, communicator 120 determines the desired data-signal transmit power according to the following equation:
desiredtransmitPower=TPCresponseTxPower−RSSIRx+RSSIdesiredRate
Here desiredtransmitPower is the desired transmit power at which the data-receiving device requests that the data-transmitting device transmit the data signal. The TPCresponseTxPower is the current transmit power of the data-transmitting device. RSSI stands for “Received Signal Strength Indication”. The RSSIRx is the received power of the received response. The RSSIdesiredRate is the desired received power. The desired power at which the data-signal is received is often based at least in part on the capabilities and configuration of the wireless receiver. Some wireless receivers receive data signals best at a particular power different from other wireless receivers, either independent of or based on the particular modulation of the data signal.
At block 314, the data-transmitting device receives the desired data-signal transmit power and transmits a data signal at the desired data-signal transmit power, which is received at the data-receiving device shown at block 316. At this point a link for communication is complete for data transmission based on the management transmissions communicated at blocks 306 through 312 and part of 314. In some cases, however, the data signal will be received by the data-receiving device having less than a maximum throughput for the modulation at which the data signal is sent. In such a case the method 300 proceeds along optional paths to blocks 318 and 320 as well as repeating some other actions of method 300.
As noted above, the data-receiving device at block 316 receives signals at a received power. Communicator 120 may then determine at block 318 that the received power has a less-than-maximum throughput for the modulation. Responsive to this determination and based on the received power of the data signal, communicator 120 determines a second desired data-signal transmit power at block 320. Communicator 120 may do so in a manner similar to the manner in which the first desired data-signal transmit power was determined.
One difference is that additional information has been gained, such as the received power of the data signal rather than the received power of a link-setup response. Responsive to determining this second desired data-signal transmit power, the data-receiving device transmits this second desired data-signal transmit power also at block 320. The data-transmitting device may use this information to transmit the data signal at the second desired data-signal transmit power at block 314. Note that these blocks may be repeated again if the data-receiving device determines that the received power is still at a less-than-maximum throughput.
Following the initial link setup, the data-receiving device, if it intends to adjust the transmission power of the data signal, may do so at block 320 using a directed probe response frame, such as those used in the IEEE 802.11 family of protocols.
This method may be responsive to either the data-receiving device, the data-transmitting device, or some third-party device determining that the nominal transmission power is potentially too high for maximum throughput between the data-receiving device and the data-transmitting device. One such case is when the data-receiving device determines that a data signal or setup signal from the data transmitting device is received at a power that does not permit a maximum throughput for the modulation of the signal. The data-receiving device may determine this through interference or saturation at its wireless receiver 118. It may also be determined by the data-transmitting device through delays or other information learned from communications from the data-receiving device or a third-party device.
The communication link established as part of method 300 can optionally be maintained, such as with closed-loop or open-loop control. Examples of open-loop control include ones that determine whether there has been a change in the received data-signal power and, responsive to this change, change a transmit power of the data-receiving device. Thus, communicator 120 may use an increase or decrease in received power of a data signal from the data-transmitting device to extrapolate that the data-receiving device will need to increase or decrease its transmission power in a similar manner. One case in which this occurs is when a device moves closer to or further away from the other device. In the example above a user may move the cellular phone 104 or the laptop computing device 112.
In more detail, communicator 120 may adjust transmission power of the data-receiving device or the data-transmitting device, depending on which device this particular communicator 120 resides in, using the following equation:
newtransmitPower=oldtransmitPower−oldRSSI+newRSSI
Here newtransmitPower is the new (second or later) desired transmit power at which the data-receiving device requests that the data-transmitting device transmits the data signal. The oldtransmitPower is the previous transmit power desired and requested. This is also the most-recent previous transmit power if the newtransmitPower is a third or later requested power. The oldRSSI is the previous (or in some cases average also) received power. The newRSSI is the current received power (or in some cases an average also).
Examples of closed-loop control include periodically re-performing some steps of the method 300 to determine a new desired data-signal transmit power or performing these steps responsive to determining a change in a throughput of a data signal. These steps include those performed at blocks 306, 310, and 312 and/or 318 and 320.
Lost Node
    • As noted in part above, in some cases a device that is transmitting a wireless signal may not be noticed by another device intending to transmit a signal. This signal from the other device may interfere with the signal of the unnoticed device (aka the “lost node”). This potential problem is exacerbated when a transmission is made at low power. To address this potential problem, the present specification describes techniques and apparatus that enable a device to determine that a low-power transmission will be made, which permit devices to effectively communicate at short range and often without interference by other devices.
FIG. 4 illustrates example devices and transmission areas in which a lost-node problem can potentially occur in the context of low-power transmission. Consider four examples of wireless-communication-capable devices 102 of FIG. 1. The first two devices are within a low-power transmission area 402. These two devices are low-power-area transmitting device 404 and low-power-area receiving device 406. The second two devices are within a higher-power transmission area 408. These two devices are higher-power-area transmitting device 410 and higher-power-area receiving device 412.
Note that area 402 overlaps with area 408. This overlap illustrates that a device in area 408 may potentially transmit a signal that interferes with signals in area 402. Such interferences are possible if a device in area 408 is not aware of low-power transmission in area 402.
The following discussion describes techniques to mitigate this and other interferences. These techniques may be implemented utilizing the previously described environment of FIGS. 1 and 4 as well as others. Aspects of these methods may be implemented in hardware, firmware, software, or a combination thereof. These methods are shown as a set of blocks that specify operations performed by one or more entities and are not necessarily limited to the orders shown for performing the operations by the respective blocks.
FIG. 5 depicts a method 500 in an example implementation in which a device can address a potential lost-node problem. At block 502, a device intending to transmit at low power transmits a signal requesting a transmission medium for a duration of time. This signal may be sent having a robust modulation signal to increase the likelihood that a device (e.g., an Access Point or some device that may transmit) will receive and understand the transmission. The signal may also or instead be sent at a high or nominal power to increase the likelihood that a device that may not notice a future low-power signal will notice and understand this signal.
As noted in more detail below, communicator 120 may determine the duration of time based on how long the data will take to transmit using the medium and at a particular low power. This duration may be for a particular amount or all of the data. These particular amounts may be as little as some number of data packets that in total are not sufficient to transmit all of the desired data. This data can be as small as a single data packet, in which case the duration of time is short. In such a case the method 500 may be repeated for each packet, packets, or other particular amount of data.
Again consider FIG. 4. Here assume that cellular phone 406 intends to communicate at low power with desktop computing device 404, such as to sync up cellular phone 406's calendar with desktop computing device 404's calendar. Prior to doing so, cellular phone 406 (using communicator 120 and wireless transmitter 116 of FIG. 1) transmits a signal requesting a transmission medium so that the device can transmit a signal at low power. Here assume that cellular phone 406 transmits with wireless transmitter 116 and according to IEEE 802.11, with a robust modulation, and at nominal power. Examples of such a signal include a Request To Send (RTS) packet and a Clear To Send-Self (CTS-Self) packet.
At block 504, the transmitting device either receives a response from one or more third-party devices indicating that the requested medium is free to use or does not. If no response is received, the device proceeds along the “No” path to block 506. At block 506, the device waits some time period sufficient to indicate that no other devices received the request at block 504 or otherwise indicate that the medium is fee to use. After this wait period, the device proceeds to block 508.
At block 508 the device transmits at low power and for up to about the duration of time requested at block 504. If, however, the device receives a response indicating that the requested transmission medium is free to use, the device follows the “Yes” path to block 508 without a wait period. A response may include a Clear To Send (CTS) packet from other devices. Following the transmission at low power at block 508, the device may optionally proceed to block 510 to repeat the process. As noted in more detail below, the duration of time may be for a particular amount of data. If this amount of data is broken into pieces, or is small and discrete, such as a packet of data, then multiple pieces and multiple durations of time may be transmitted and requested.
Continuing the above example, assume that wireless receiver 118 of cellular phone 406 receives a signal from a device or access point (e.g., tablet computer 410) indicating that the other device or access point is granting the transmission medium. In some cases this signal in response to the request may be a CTS frame indicating that the medium is free to use. When sent from an access point, the response may indicate that the access point has set its NAV to not use the transmission medium for the duration of time. In any of these cases, communicator 120 receives this indication (demodulated by wireless receiver 118 and passed to communicator 120) and proceeds to block 508.
After receiving a response or waiting the period, cellular phone 406 transmits at low power (block 508). In this ongoing example, cellular phone 406's wireless receiver 118 receives the response indicating that the communication medium will not be used, after which communicator 120 permits cellular phone 406's wireless transmitter 116 to transmit at low power to desktop computing device 404 for the duration of time. If the duration is for a piece rather than all of the data, the device may repeat, following block 510, one or more parts of the method 500.
Note that the method of FIG. 5 may permit devices 404 and 406 to communicate at low power without interference from devices 410 and 412. Note also that this method may enable either or both of devices 410 and 412 to avoid interference from devices 404 and 406 as well, such as when a low-power transmission from cellular phone 406 may interfere with a transmission (high or low power) from tablet computer 410 that is intended for receipt by laptop computing device 412.
System-on-Chip Example
    • FIG. 6 illustrates an example System-on-Chip (SoC) 600, which can implement various embodiments described above. An SoC can be implemented in a fixed or mobile device, such as any one or combination of a media device, computer device, television set-top box, video processing and/or rendering device, appliance device, gaming device, electronic device, vehicle, workstation, and/or in any other type of device that may communicate wirelessly in a local or personal area network that may operate at short range. Examples of some of these are shown in FIG. 1 at 102.
SoC 600 can be integrated with electronic circuitry, a microprocessor, memory, input-output (I/O) logic control, communication interfaces and components, other hardware, firmware, and/or software needed to run an entire device. SoC 600 can also include an integrated data bus (not shown) that couples the various components of the SoC for data communication between the components. A device that includes SoC 600 can also be implemented with many combinations of differing components.
In this example, SoC 600 includes various components such as an input-output (I/O) logic control 602 (e.g., to include electronic circuitry) and a microprocessor 604 (e.g., any of a microcontroller or digital signal processor). SoC 600 also includes a memory 606, which can be any type of random access memory (RAM), a low-latency nonvolatile memory (e.g., flash memory), read only memory (ROM), and/or other suitable electronic data storage. SoC 600 can also include various firmware and/or software, such as an operating system 608, which can be computer-executable instructions maintained by memory 606 and executed by microprocessor 604. SoC 600 can also include other various communication interfaces and components, wireless LAN (WLAN) or PAN (WPAN) components, other hardware, firmware, and/or software.
SoC 600 may include wireless transmitter 116, wireless receiver 118, and short-range wireless communicator 120 (in either or multiple devices as noted above). Examples of these various components, functions, and/or entities, and their corresponding functionality, are described with reference to the respective components of the example environment 100 shown in FIG. 1.
Communicator 120 in SoC 600, either independently or in combination with other entities, can be implemented as computer-executable instructions maintained by memory 606 and executed by microprocessor 604 to implement various embodiments and/or features described herein. Short-range wireless communicator 120 may also be provided integral with other entities of the SoC, such as integrated with one or both of wireless transmitter 116 and wireless receiver 118. Alternatively or additionally, communicator 120 and the other components can be implemented as hardware, firmware, fixed logic circuitry, or any combination thereof that is implemented in connection with the I/O logic control 602 and/or other signal processing and control circuits of SoC 600.
This specification describes techniques and apparatus that enable short-range wireless communication by reducing the transmission power of a transmitting device. This enables a receiving device to demodulate the signal without being interfered with by a too-powerful transmitted signal. The techniques described herein also address “lost-node” problems that may arise in lower-power transmissions and in other cases where a node is not detected.
Although the subject matter has been described in language specific to structural features and/or methodological steps, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or steps described above, including orders in which they are performed.

Claims (20)

What is claimed is:
1. One or more computer-readable memory devices storing processor-executable instructions, that responsive to execution by a processor, implement a wireless communicator to:
transmit, via a transmitter, a link-setup request through a wireless network to a device, the link-setup request requesting a current transmit power of the device and transmitted at a lower-than-nominal power level of the transmitter effective to reduce saturation of a receiver of the device;
receive, via a receiver, a link-setup response through the wireless network from the device, the link-setup response indicating the current transmit power of the device and having been received at a received power;
determine, based on the received power at which of the link-setup response is received, a desired data-signal transmit power for the device; and
transmit, via the transmitter, an indication of the desired data-signal transmit power through the wireless network to the device.
2. The one or more computer-readable memory devices of claim 1, comprising additional processor-executable instructions, that responsive to execution by the processor, implement the wireless communicator to determine whether a data signal received through the wireless network from the device is received at a power level that is too high to permit maximum communicative throughput with the device.
3. The one or more computer-readable memory devices of claim 1, comprising additional processor-executable instructions, that responsive to execution by the processor, implement the wireless communicator to:
receive, via the receiver, a data signal through the wireless network from the device, the data signal being received at a received data-signal power and having a modulation;
determine whether the data signal has a less-than-maximum throughput for the modulation;
determine, responsive to determining that the data signal has the less-than-maximum throughput and based on the received data-signal power, a second desired data-signal transmit power; and
transmit, via the transmitter, an indication of the second desired data-signal transmit power through the network to the device.
4. The one or more computer-readable memory devices of claim 3, wherein transmitting the indication of the second desired data-signal transmit power to the device comprises using a directed probe response frame.
5. The one or more computer-readable memory devices of claim 3, comprising additional processor-executable instructions, that responsive to execution by the processor, implement the wireless communicator to maintain a communication link through which the data signal is communicated.
6. The one or more computer-readable memory devices of claim 5, comprising additional processor-executable instructions, that responsive to execution by the processor, implement the wireless communicator to change, in response to a change in the received data-signal power, a transmit power at which communications with the device are transmitted to maintain the communication link.
7. The one or more computer-readable memory devices of claim 5, comprising additional processor-executable instructions, that responsive to execution by the processor, implement the wireless communicator to periodically re-determine whether the data signal has a less-than-maximum throughput for the modulation.
8. The one or more computer-readable memory devices of claim 1, wherein transmitting the link-setup request and transmitting the desired data-signal transmit power are performed using a direct-sequence spread spectrum (DSSS) modulation scheme.
9. The one or more computer-readable memory devices of claim 1, wherein transmitting the indication of the desired data-signal transmit power to the device is effective to cause the device to alter the current transmit power of the device.
10. A System-on-Chip (SoC) comprising:
a hardware interface to a receiver, the receiver configured to receive data via a wireless medium;
a hardware interface to a transmitter, the transmitter configured to transmit data via the wireless medium; and
one or more processors configured to execute processor-executable instructions that, responsive to execution, implement a wireless communicator:
transmit, via the transmitter, a link-setup request through the wireless medium to a device, the link-setup request requesting a current transmit power of the device and transmitted at a lower-than-nominal power level of the transmitter effective to reduce saturation of a receiver of the device;
receive, via the receiver, a link-setup response through the wireless medium from the device, the link-setup response indicating the current transmit power of the device and having been received at a received power;
determine, based on the current transmit power of the device and the received power at which of the link-setup response is received, a desired data-signal transmit power for the device; and
transmit, via the transmitter, an indication of the desired data-signal transmit power through the wireless medium to the device.
11. The SoC of claim 10, wherein the received power at which the link-setup response is received is indicated by a received signal strength indication (RSSI) associated with a communication link with the device.
12. The SoC of claim 10, wherein the wireless medium is associated with a wireless personal area network following an IEEE 802.11-2007 communication protocol.
13. The SoC of claim 12, wherein transmitting the link-setup request and transmitting the indication of the desired data-signal transmit power are performed using a direct-sequence spread spectrum (DSSS) modulation scheme.
14. The SoC of claim 10, wherein the wireless communicator is further implemented to:
receive, via the receiver, a data signal through the wireless medium from the device, the data signal having been received at a received data-signal power and having a particular modulation;
determine whether the data signal has a less-than-maximum throughput for the particular modulation;
determine, responsive to determining that the data signal has the less-than maximum throughput and based on the received data-signal power, a second desired data-signal transmit power; and
transmit, via the transmitter, an indication of the second desired data-signal transmit power through the wireless medium to the device.
15. The SoC of claim 10, the particular modulation of the data signal received from the device is an orthogonal frequency division multiplex (OFDM) modulation or a complimentary code keying (CCK) modulation.
16. A wireless-communication-capable device comprising:
a receiver configured to receive data via a wireless network;
a transmitter configured to transmit data via the wireless network; and
a wireless communicator configured to:
receive, via the receiver, a link-setup request through the wireless network from another wireless-communication-capable device, the link-setup request: requesting a current transmit power of the transmitter; modulated using a first modulation scheme; and received at a power level insufficient to saturate the receiver;
transmit, via the transmitter, a link-setup response through the wireless network to the other wireless-communication-capable device, the link-setup response: indicating the current transmit power of the transmitter; and modulated using the first modulation scheme;
receive, via the receiver and in response to the link-setup response, an indication of a desired data-signal transmit power through the wireless network from the other wireless-communication-capable device, the indication of a desired data-signal transmit power: indicating a desired transmit power at which data-signals modulated using a second modulation scheme are to be transmitted; and modulated using the first modulation scheme; and
transmit, via the transmitter, the data signals modulated using the second modulation scheme and through the wireless network to the other wireless-communication-capable device, the data signals transmitted at the desired data-signal transmit power.
17. The wireless-communication-capable device of claim 16, wherein the first modulation scheme is a direct-sequence spread spectrum (DSSS) modulation scheme.
18. The wireless-communication-capable device of claim 16, wherein the second modulation scheme is an orthogonal frequency division multiplex (OFDM) modulation scheme or a complimentary code keying (CCK) modulation.
19. The wireless-communication-capable device of claim 16, wherein a distance between the wireless-communication-capable device and the other wireless-communication-capable device is about 0.2 meters or less.
20. The wireless-communication-capable device of claim 16, wherein the wireless network is a wireless personal area network following a short-range radio communication protocol.
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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120071188A1 (en) * 2009-06-03 2012-03-22 Huawei Technologies Co., Ltd. Dynamic spectrum allocation method and device
US8649734B1 (en) 2007-08-13 2014-02-11 Marvell International Ltd. Bluetooth scan modes
US8655279B2 (en) 2008-06-16 2014-02-18 Marvell World Trade Ltd. Short-range wireless communication
US8923788B1 (en) 2008-06-27 2014-12-30 Marvell International Ltd. Circuit and method for adjusting a digitally controlled oscillator
US8983557B1 (en) 2011-06-30 2015-03-17 Marvell International Ltd. Reducing power consumption of a multi-antenna transceiver
US8982826B1 (en) 2009-04-24 2015-03-17 Marvell International Ltd. Method for transmitting information in a regulated spectrum and network configured to operate in the regulated spectrum
US9055460B1 (en) 2008-08-11 2015-06-09 Marvell International Ltd. Location-based detection of interference in cellular communications systems
US9066369B1 (en) 2009-09-16 2015-06-23 Marvell International Ltd. Coexisting radio communication
US9078108B1 (en) 2011-05-26 2015-07-07 Marvell International Ltd. Method and apparatus for off-channel invitation
US9125216B1 (en) 2011-09-28 2015-09-01 Marvell International Ltd. Method and apparatus for avoiding interference among multiple radios
US9131520B1 (en) 2009-04-06 2015-09-08 Marvell International Ltd. Packet exchange arbitration for coexisting radios
US9148200B1 (en) 2007-12-11 2015-09-29 Marvell International Ltd. Determining power over ethernet impairment
US9215708B2 (en) 2012-02-07 2015-12-15 Marvell World Trade Ltd. Method and apparatus for multi-network communication
US9294997B1 (en) 2010-05-11 2016-03-22 Marvell International Ltd. Wakeup beacons for mesh networks
US9332488B2 (en) 2010-10-20 2016-05-03 Marvell World Trade Ltd. Pre-association discovery
US9401737B1 (en) 2007-09-21 2016-07-26 Marvell International Ltd. Circuits and methods for generating oscillating signals
US9450649B2 (en) 2012-07-02 2016-09-20 Marvell World Trade Ltd. Shaping near-field transmission signals
US9655041B1 (en) 2008-12-31 2017-05-16 Marvell International Ltd. Discovery-phase power conservation

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8644875B2 (en) * 2011-09-08 2014-02-04 Nokia Corporation Transmit power control in multi-radio apparatus
CN103139879B (en) * 2011-11-28 2016-12-07 安凯(广州)微电子技术有限公司 A kind of wireless personal local area network communication system
JP5612048B2 (en) * 2012-09-14 2014-10-22 株式会社東芝 Wireless communication apparatus and method
US9197166B2 (en) 2012-09-26 2015-11-24 Apple Inc. Increasing power amplifier linearity to facilitate in-device coexistence between wireless communication technologies
KR101604202B1 (en) * 2012-09-26 2016-03-16 애플 인크. Transmission power modulation to facilitate in-device coexistence between wireless communication technologies
KR101891005B1 (en) 2013-06-12 2018-08-22 콘비다 와이어리스, 엘엘씨 Context and power control information management for proximity services
WO2014205370A1 (en) 2013-06-21 2014-12-24 Convida Wireless, Llc Context management
KR101975365B1 (en) 2013-07-10 2019-05-07 콘비다 와이어리스, 엘엘씨 Context-aware proximity services
US10719812B2 (en) * 2013-11-04 2020-07-21 Koninklijke Philips N.V. Method of notifying a user on a task of an apparatus
CN104159280A (en) * 2014-08-01 2014-11-19 科立讯通信股份有限公司 Method for reducing power consumption of DMR terminal circuit
US10091742B2 (en) 2015-01-08 2018-10-02 Mitsubishi Electric Corporation Wireless communication device
WO2019235892A1 (en) * 2018-06-07 2019-12-12 엘지전자 주식회사 Method and apparatus for controlling power of device by using bluetooth technology
KR20200121639A (en) * 2019-04-16 2020-10-26 삼성전자주식회사 Wireless power receiver and method for supplying wireless power thereof

Citations (71)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4805215A (en) 1986-10-01 1989-02-14 Racal Data Communications Inc. Adaptive echo canceller with sparse dynamically positioned taps
US5708656A (en) * 1996-09-11 1998-01-13 Nokia Mobile Phones Limited Method and apparatus for packet data transmission
WO2001078252A1 (en) 2000-04-07 2001-10-18 Koninklijke Philips Electronics N.V. Radio communication system and method of controlling downlink transmission power or bit rate
US6347091B1 (en) * 1998-06-19 2002-02-12 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for dynamically adapting a connection state in a mobile communications system
US6366622B1 (en) 1998-12-18 2002-04-02 Silicon Wave, Inc. Apparatus and method for wireless communications
US6374117B1 (en) * 1999-12-22 2002-04-16 Telefonaktiebolaget Lm Ericsson (Publ) Queue based power control scheduling
WO2002082751A2 (en) 2001-04-09 2002-10-17 Telefonaktiebolaget Lm Ericsson (Publ) Instantaneous joint transmit power control and link adaptation for rts/cts based channel access
WO2002091623A1 (en) 2001-05-10 2002-11-14 Koninklijke Philips Electronics N.V. Updating path loss estimation for power control and link adaption in ieee 802.11h wlan
US6519461B1 (en) * 1999-10-29 2003-02-11 Telefonaktiebolaget Lm Ericsson (Publ) Channel-type switching from a common channel to a dedicated channel based on common channel load
US6553229B1 (en) 1998-11-24 2003-04-22 Ericsson Inc. Signal scanning systems and methods for multiple-mode cellular radiotelephones
US20030198200A1 (en) 2002-04-22 2003-10-23 Cognio, Inc. System and Method for Spectrum Management of a Shared Frequency Band
US6640308B1 (en) 1999-04-16 2003-10-28 Invensys Systems, Inc. System and method of powering and communicating field ethernet device for an instrumentation and control using a single pair of powered ethernet wire
US6675328B1 (en) 1999-10-08 2004-01-06 Vigilant Networks, Llc System and method to determine data throughput in a communication network
US20040063403A1 (en) 2002-09-30 2004-04-01 Durrant Randolph L. Methods for identification of IEEE 802.11b radio signals
US20040110470A1 (en) * 2002-12-09 2004-06-10 Tsien Chih C. Method and apparatus to control transmitter
US20040214575A1 (en) 2003-04-22 2004-10-28 Vladan Jovanovic Method of handoff at the border between CDMA underlay and overlay systems
US20050058151A1 (en) 2003-06-30 2005-03-17 Chihsiang Yeh Method of interference management for interference/collision avoidance and spatial reuse enhancement
US20050120119A1 (en) 2003-12-01 2005-06-02 Microsoft Corporation Smart scan for bluetooth pan devices
US6934566B2 (en) 2000-12-21 2005-08-23 Samsung Electronics Co., Ltd Wireless communication device and controlling method thereof
US6946950B1 (en) 1999-07-12 2005-09-20 Matsushita Electric Industrial Co., Ltd. Mobile body discrimination apparatus for rapidly acquiring respective data sets transmitted through modulation of reflected radio waves by transponders which are within a communication region of an interrogator apparatus
US6954708B2 (en) 1999-08-11 2005-10-11 Broadcom Corporation System and method for detecting a device requiring power
US20060063509A1 (en) 1999-01-12 2006-03-23 David Pincu System for providing power over Ethernet through a patch panel
US20060128308A1 (en) 2004-12-10 2006-06-15 Texas Instruments Incorporated Low power bluetooth page and inquiry scan
US7079811B2 (en) 2001-08-15 2006-07-18 Qualcomm, Incorporated Dual mode bluetooth/wireless device with power conservation features
US20060189359A1 (en) 2000-09-28 2006-08-24 David Kammer Power-conserving intuitive device discovery technique in a Bluetooth environment
US20060239443A1 (en) 2004-10-15 2006-10-26 Oxford William V Videoconferencing echo cancellers
US20060281404A1 (en) 2005-06-13 2006-12-14 Samsung Electronics Co., Ltd Relay system and method for cellular communication
JP2007028568A (en) 2005-06-14 2007-02-01 Ntt Docomo Inc Base station, mobile station, and power control method
US7173431B1 (en) 2002-06-07 2007-02-06 Marvell International Ltd. Cable tester
US20070081553A1 (en) 2005-10-12 2007-04-12 Finisar Corporation Network tap device powered by power over ethernet
US7206840B2 (en) * 2001-05-11 2007-04-17 Koninklike Philips Electronics N.V. Dynamic frequency selection scheme for IEEE 802.11 WLANs
US20070103829A1 (en) 2005-11-10 2007-05-10 Powerdsine, Ltd. Enhanced Classification for Power Over Ethernet
US7257095B2 (en) 2003-07-30 2007-08-14 Texas Instruments Incorporated Power saving via physical layer address filtering in WLANs
US20070280471A1 (en) 2006-06-02 2007-12-06 Broadcom Corporation Minimizing saturation caused by power transfer in a communication system transformer
US20080027033A1 (en) 2003-11-19 2008-01-31 Acrux Dds Pty Ltd Method and Composition for Treatment of Cutaneous Lesions
US7355416B1 (en) 2007-01-07 2008-04-08 Microsemi Corp.- Analog Mixed Signal Group Ltd. Measurement of cable quality by power over ethernet
US7377441B2 (en) 2004-03-05 2008-05-27 Microvision, Inc. Electronic device with auxiliary interfaces
US20080129118A1 (en) 2006-11-30 2008-06-05 Broadcom Corporation System and method for controlling power delivered to a powered device based on channel impediments
US7403018B1 (en) 2002-06-07 2008-07-22 Marvell International Ltd. Cable tester
US20080310067A1 (en) 2007-06-12 2008-12-18 Broadcom Corporation System and method for using a phy to locate a thermal signature in a cable plant for diagnostic, enhanced, and higher power applications
US20090005061A1 (en) 2005-12-30 2009-01-01 Trueposition, Inc. Location quality of service indicator
US20090168686A1 (en) 2006-08-31 2009-07-02 Motorola, Inc. Adaptive Broadcast Multicast Systems in Wireless Communication Networks
US20090168725A1 (en) 2007-12-26 2009-07-02 Qualcomm Incorporated Communication handover management
US20090170497A1 (en) 2007-12-28 2009-07-02 Guowang Miao Probabilistic interference mitigation for wireless cellular networks
US20090190541A1 (en) 2008-01-28 2009-07-30 Saied Abedi Communication systems
US20090202013A1 (en) 2001-06-28 2009-08-13 Sebastian Peroor K Wireless communication network and method for extended-range uplink communications
US20090291640A1 (en) 2008-05-22 2009-11-26 Qualcomm Incorporated System and method to enable resource partitioning in wireless networks
US20090311961A1 (en) 2008-06-16 2009-12-17 Raja Banerjea Short-Range Wireless Communication
US20090312027A1 (en) 2008-06-17 2009-12-17 Foschini G J Method for adaptive formation of cell clusters for cellular wireless networks with coordinated transmission and reception
US20100009675A1 (en) 2008-07-14 2010-01-14 Nokia Corporation Setup of device-to-device connection
US7659003B2 (en) 2004-10-28 2010-02-09 Shin-Etsu Chemical Co., Ltd. Silicone composition and a pressure sensitive adhesive film having a pressure sensitive adhesive layer made from the composition
US20100082957A1 (en) 2008-10-01 2010-04-01 Fujitsu Limited Information processing device
US20100097952A1 (en) 2006-05-12 2010-04-22 Shared Spectrum Company Method and System for Classifying Communication Signals in a Dynamic Spectrum Access System
US20100103867A1 (en) 2007-01-09 2010-04-29 Ntt Docomo, Inc. Base station apparatus, user equipment, and method used in mobile communication system
US20100216497A1 (en) 2005-02-18 2010-08-26 Fujitsu Limited Base station and interference reduction method in base station
US20100248734A1 (en) 2007-03-29 2010-09-30 Kyocera Corporation Communication Control Method, Communication System and Communication Control Apparatus
US7826411B2 (en) 2007-05-10 2010-11-02 Broadcom Corporation Cooperative transceiving between wireless interface devices of a host device with shared modules
US20100303026A1 (en) 2009-05-29 2010-12-02 Motorola, Inc. Method and apparatus for zone controller based dynamic spectrum allocation
US7849333B2 (en) 2006-05-08 2010-12-07 Cisco Technology, Inc. Inline power allocation for power over Ethernet applications
US7876786B2 (en) 2006-12-01 2011-01-25 Microsoft Corporation Dynamic time-spectrum block allocation for cognitive radio networks
US7881746B2 (en) 2007-05-10 2011-02-01 Broadcom Corporation Shared processing between wireless interface devices of a host device
US7936714B1 (en) 2002-03-11 2011-05-03 Netgear, Inc. Spectrum allocation system and method for multi-band wireless RF data communications
US7995544B2 (en) * 2001-11-02 2011-08-09 At&T Intellectual Property Ii, L.P. Wireless LANs and neighborhood capture
US8000715B2 (en) 2005-08-04 2011-08-16 Stmicroelectronics S.R.L. Method and system for dynamic spectrum allocation, and computer program product therefor
US8060017B2 (en) 2008-04-04 2011-11-15 Powerwave Cognition, Inc. Methods and systems for a mobile, broadband, routable internet
US8107391B2 (en) 2008-11-19 2012-01-31 Wi-Lan, Inc. Systems and etiquette for home gateways using white space
US8150328B2 (en) 2008-09-17 2012-04-03 Motorola Solutions, Inc. Method and apparatus for distributed sensing management and control within a cognitive radio network
US8275314B1 (en) 2007-08-13 2012-09-25 Marvell International Ltd. Bluetooth scan modes
US8364188B2 (en) 2010-06-04 2013-01-29 Alcatel Lucent Method and controller for allocating whitespace spectrum
US8472968B1 (en) 2008-08-11 2013-06-25 Marvell International Ltd. Location-based detection of interference in cellular communications systems
US8532041B1 (en) 2009-04-24 2013-09-10 Marvell International Ltd. Method for transmitting information in a regulated spectrum and network configured to operate in the regulated spectrum

Family Cites Families (274)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4337463A (en) 1980-08-22 1982-06-29 Control Data Corporation Time synchronization master station and remote station system
US5347234A (en) 1993-03-26 1994-09-13 International Business Machines Corp. Digital voltage controlled oscillator
US5673291A (en) 1994-09-14 1997-09-30 Ericsson Inc. Simultaneous demodulation and decoding of a digitally modulated radio signal using known symbols
JPH08223065A (en) 1995-02-13 1996-08-30 Toshiba Corp Frequency converter
KR100243489B1 (en) 1995-11-22 2000-02-01 니시무로 타이죠 Frequency converter and radio receiver using it
US5847616A (en) 1996-12-12 1998-12-08 Tritech Microelectronics International, Ltd. Embedded voltage controlled oscillator with minimum sensitivity to process and supply
US6167245A (en) 1998-05-29 2000-12-26 Silicon Laboratories, Inc. Method and apparatus for operating a PLL with a phase detector/sample hold circuit for synthesizing high-frequency signals for wireless communications
JP3631375B2 (en) 1998-06-30 2005-03-23 株式会社東芝 Divider
US6879816B2 (en) 1998-11-12 2005-04-12 Broadcom Corporation Integrated switchless programmable attenuator and low noise amplifier
US6320919B1 (en) 1998-11-30 2001-11-20 Ericsson Inc. Adaptive channel characterization using decoded symbols
US6754189B1 (en) 1999-04-08 2004-06-22 Lucent Technologies Inc. Method of queue length based burst management in wireless communication systems
JP3512676B2 (en) 1999-04-30 2004-03-31 Necエレクトロニクス株式会社 Voltage controlled oscillator
JP3127918B1 (en) 1999-07-14 2001-01-29 住友電気工業株式会社 Road-to-vehicle communication system, roadside communication station and on-vehicle mobile station
JP3349477B2 (en) 1999-09-08 2002-11-25 三洋電機株式会社 Mobile communication device, mobile communication system, and communication channel assignment request method
US7299006B1 (en) 1999-10-21 2007-11-20 Broadcom Corporation Adaptive radio transceiver
US6968167B1 (en) 1999-10-21 2005-11-22 Broadcom Corporation Adaptive radio transceiver with calibration
US6535037B2 (en) 2000-02-04 2003-03-18 James Maligeorgos Injection locked frequency multiplier
EP1133118A3 (en) 2000-03-10 2002-02-06 Alcatel IP/Data traffic allocating method to maintain QoS
JP2001285129A (en) 2000-03-29 2001-10-12 Nec Corp Circuit and method for cdma demodulation
US6438364B1 (en) 2000-06-06 2002-08-20 Philips Electronics North America Corporation Radio frequency device with fast charging of an input capacitance
JP3673149B2 (en) 2000-07-11 2005-07-20 クラリオン株式会社 High speed roaming method for wireless LAN
US6738358B2 (en) 2000-09-09 2004-05-18 Intel Corporation Network echo canceller for integrated telecommunications processing
US6509777B2 (en) 2001-01-23 2003-01-21 Resonext Communications, Inc. Method and apparatus for reducing DC offset
US7043242B2 (en) 2001-01-31 2006-05-09 Nokia Corporation Measurement method and device for activating interfrequency handover in a wireless telecommunication network
US6741862B2 (en) 2001-02-07 2004-05-25 Airvana, Inc. Enhanced reverse-link rate control in wireless communication
US6947857B2 (en) 2001-03-16 2005-09-20 Mindspeed Technologies, Inc. Optical sequence time domain reflectometry during data transmission
US7151769B2 (en) 2001-03-22 2006-12-19 Meshnetworks, Inc. Prioritized-routing for an ad-hoc, peer-to-peer, mobile radio access system based on battery-power levels and type of service
US7092428B2 (en) 2001-03-30 2006-08-15 Mediatek Selective frequency hopping for hit avoidance in wireless communications system and method
US6650195B1 (en) 2001-07-30 2003-11-18 Xilinx, Inc. Oscillator with differential tunable tank circuit
CN1156179C (en) 2001-09-03 2004-06-30 信息产业部电信传输研究所 Dynamic regulation method and device of channel estimation everage region
US7099642B2 (en) 2001-11-09 2006-08-29 Qualcomm, Incorporated Method and apparatus for matching receiver carrier frequency
US6816718B2 (en) 2002-02-07 2004-11-09 Rf Micro Devices, Inc. DC offset correction using dummy amplifier
US7194283B2 (en) 2002-08-14 2007-03-20 Intel Corporation Method and apparatus for communication using multiple communication protocols
GB0220660D0 (en) 2002-09-05 2002-10-16 Nokia Corp Signal propogation delay routing
US7013158B1 (en) 2002-11-25 2006-03-14 Sprint Spectrum L.P. Method and system for brokering frequencies to facilitate peer-to-peer communication
KR100457537B1 (en) 2002-12-02 2004-11-17 삼성전자주식회사 Apparatus and method for reducing power consumption in a ad-hoc network
CN100517985C (en) 2002-12-20 2009-07-22 株式会社瑞萨科技 Transmission circuit and transmitter/receiver using same
US7747244B2 (en) 2003-01-23 2010-06-29 Research In Motion Limited Methods and apparatus for re-establishing communication for a wireless communication device after a communication loss in a wireless communication network
US20040192222A1 (en) 2003-03-26 2004-09-30 Nokia Corporation System and method for semi-simultaneously coupling an antenna to transceivers
KR100533626B1 (en) 2003-04-01 2005-12-06 삼성전기주식회사 Quadrature signal generator with feedback type frequency doubler
US20040233881A1 (en) 2003-05-06 2004-11-25 Samsung Electronics Co., Ltd. Route discovery device and method in a mobile ad-hoc network
US8351891B2 (en) 2003-05-30 2013-01-08 The Regents Of The University Of California Wideband distributed mixers
US7146133B2 (en) 2003-06-19 2006-12-05 Microsoft Corporation Wireless transmission interference avoidance on a device capable of carrying out wireless network communications
US7595768B2 (en) 2003-06-27 2009-09-29 Intel Corporation Switching schemes for multiple antennas
US7212798B1 (en) 2003-07-17 2007-05-01 Cisco Technology, Inc. Adaptive AGC in a wireless network receiver
US7715434B2 (en) 2003-07-30 2010-05-11 Michael Andrew Fischer Managing an access point in the presence of separate protocols that share the same communications channel
US20050025104A1 (en) 2003-07-30 2005-02-03 Fischer Michael Andrew Managing coexistence of separate protocols sharing the same communications channel
US20050038876A1 (en) 2003-08-15 2005-02-17 Aloke Chaudhuri System and method for instant match based on location, presence, personalization and communication
KR100970725B1 (en) 2003-09-17 2010-07-16 삼성전자주식회사 Frequency subband allocation method and, management apparatus thereof
JP4185853B2 (en) 2003-11-28 2008-11-26 株式会社日立コミュニケーションテクノロジー Wireless system, server, and mobile station
JP4319502B2 (en) 2003-10-01 2009-08-26 株式会社ルネサステクノロジ Semiconductor integrated circuit for communication and wireless communication system
US8483105B2 (en) 2003-10-15 2013-07-09 Qualcomm Incorporated High speed media access control
US7276979B2 (en) 2003-10-24 2007-10-02 Matsushita Electric Industrial Co., Ltd. Oscillation device and mobile communication apparatus
US20050118977A1 (en) 2003-12-02 2005-06-02 Drogi Serge F. Method, apparatus, and systems for digital radio communication systems
KR100669238B1 (en) 2003-12-19 2007-01-15 한국전자통신연구원 Method for Providing Routing Protocol in Sensor Network
US7342895B2 (en) 2004-01-30 2008-03-11 Mark Serpa Method and system for peer-to-peer wireless communication over unlicensed communication spectrum
US8744516B2 (en) 2004-02-05 2014-06-03 Sri International Generic client for communication devices
JP4349142B2 (en) 2004-02-09 2009-10-21 ソニー株式会社 Wireless communication apparatus, wireless communication method, and computer program
US7233773B2 (en) 2004-02-13 2007-06-19 Broadcom Corporation Configuring a MIMO communication
US7734253B2 (en) 2004-03-29 2010-06-08 Intel Corporation Apparatus and methods for coexistence of collocated wireless local area network and bluetooth® based on dynamic fragmentation of WLAN packets
EP1734524B1 (en) * 2004-03-31 2011-06-22 CLARION Co., Ltd. Floating lock device
EP1733528A1 (en) 2004-04-05 2006-12-20 TELEFONAKTIEBOLAGET LM ERICSSON (publ) Method, communication device and system for address resolution mapping in a wireless multihop ad hoc network.
JP4475639B2 (en) 2004-04-14 2010-06-09 キヤノン株式会社 Wireless terminal apparatus, control method thereof and communication control method
KR100603561B1 (en) 2004-04-16 2006-07-24 삼성전자주식회사 System of wireless local area network based on transmit power control and method thereof
US8472322B2 (en) 2004-05-05 2013-06-25 Qualcomm Incorporated Method and apparatus for adaptive delay management
CN1951068B (en) 2004-05-07 2012-12-05 皇家飞利浦电子股份有限公司 A method of distributive reservation of a medium in a radio communications network
US20050254423A1 (en) 2004-05-12 2005-11-17 Nokia Corporation Rate shaper algorithm
MXPA06014557A (en) 2004-06-16 2007-06-14 Koninkl Philips Electronics Nv Distributed resource reservation in a wireless adhoc network.
US7636388B2 (en) 2004-07-01 2009-12-22 Broadcom Corporation Channel fault detection for channel diagnostic systems
US7627026B2 (en) 2004-07-01 2009-12-01 Broadcom Corporation Threshold setting using piecewise linear approximation for channel diagnostic systems
US7627025B2 (en) 2004-07-01 2009-12-01 Broadcom Corporation Echo canceller gain control for channel diagnostic systems
EP1769609A1 (en) 2004-07-09 2007-04-04 Philips Intellectual Property & Standards GmbH Data transmission in a communication network
US7840217B2 (en) 2004-07-23 2010-11-23 Cisco Technology, Inc. Methods and apparatus for achieving route optimization and location privacy in an IPV6 network
US7053722B2 (en) 2004-09-03 2006-05-30 Infineon Technologies Ag Voltage controlled oscillator (VCO) with output buffer
JP2006093945A (en) 2004-09-22 2006-04-06 Nec Corp Radio lan handover method and radio lan apparatus
US7689190B2 (en) 2004-09-30 2010-03-30 St-Ericsson Sa Controlling the frequency of an oscillator
BRPI0419085B1 (en) 2004-10-20 2018-05-02 Thomson Licensing WIRELESS MOBILE TERMINAL ACCESS METHOD BASED ON ACCESS POINT SERVICES AND SERVICE PARAMETERS
US7126431B2 (en) 2004-11-30 2006-10-24 Stmicroelectronics, Inc. Differential delay cell having controllable amplitude output
US7463592B2 (en) 2004-12-03 2008-12-09 Microsoft Corporation Protocol for exchanging control data to mitigate interference problems in wireless networking
KR100582727B1 (en) 2004-12-08 2006-05-22 삼성전자주식회사 Transmit power control system and method in wireless lan
JP2006174162A (en) 2004-12-16 2006-06-29 Canon Inc Wireless access point
US7626966B1 (en) 2005-01-06 2009-12-01 Idealab Ad hoc wireless communication system
US8483190B2 (en) 2005-01-18 2013-07-09 Marvell World Trade Ltd. Wireless local area network (WLAN) time division multiplexed (TDM) interframe space (IFS) time selection protocol
CN101116265B (en) * 2005-02-09 2011-02-02 三菱电机株式会社 Wireless device and sending power control based interfere preventing method
WO2006090254A1 (en) 2005-02-25 2006-08-31 Nokia Corporation Method and system for voip over wlan to bluetooth headset using advanced esco scheduling
US7370362B2 (en) 2005-03-03 2008-05-06 Cisco Technology, Inc. Method and apparatus for locating rogue access point switch ports in a wireless network
US20060199565A1 (en) 2005-03-07 2006-09-07 Wialan Technology A Florida Corporation Enhancement to the IEEE 802.11 protocol handshake
US7813295B2 (en) 2005-03-09 2010-10-12 Broadcom Corporation Co-location interference avoidance in multiple protocol communication networks
US20060203841A1 (en) 2005-03-09 2006-09-14 Fischer Matthew J Coordination of multiple protocols using a shared communication medium
WO2006098723A1 (en) 2005-03-10 2006-09-21 Thomson Licensing Hybrid mesh routing protocol
US7826408B1 (en) 2005-03-14 2010-11-02 Ozmo, Inc. Apparatus and method for integrating short-range wireless personal area networks for a wireless local area network infrastructure
US20060215601A1 (en) 2005-03-14 2006-09-28 H-Stream Wireless, Inc. Method and apparatus for coordinating a wireless PAN network and a wireless LAN network
US7395040B2 (en) 2005-03-29 2008-07-01 Broadcom Corporation Multiple band multiple input multiple output transceiver integrated circuit
JP4647361B2 (en) 2005-03-29 2011-03-09 ルネサスエレクトロニクス株式会社 Semiconductor integrated circuit
US20070173286A1 (en) 2005-04-04 2007-07-26 Broadcom Corporation, A California Corporation Distribution of shared local oscillation to multiple RF intefaces of a wireless device
EP1720289B1 (en) 2005-05-02 2012-03-14 Mitsubishi Denki Kabushiki Kaisha Method and device for managing signal measurements in a wireless network
US20060268756A1 (en) 2005-05-03 2006-11-30 Hong Kong Applied Science And Technology Research Institute Co., Ltd. Systems and methods for efficient hand-off in wireless networks
US7599686B2 (en) 2005-05-06 2009-10-06 Dell Products L.P. Systems and methods for RF spectrum management
US7668269B2 (en) 2005-05-09 2010-02-23 Ati Technologies, Inc. Systems, methods, and apparatus for phase noise mitigation
KR101337126B1 (en) 2005-05-12 2013-12-05 삼성전자주식회사 Method and apparatus for achieving re-association of handover in a wireless local area network mesh network
KR101235993B1 (en) 2005-05-12 2013-02-21 삼성전자주식회사 Method and apparatus for scheduling in a wireless local network mesh communication system
US7298183B2 (en) 2005-06-01 2007-11-20 Wilinx Corp. High frequency divider circuits and methods
US9031604B2 (en) 2005-06-02 2015-05-12 Broadcom Corporation Method and apparatus for enabling simultaneous VoWLAN and Bluetooth audio in small form factor handheld devices
JP4455418B2 (en) 2005-06-13 2010-04-21 キヤノン株式会社 Communication parameter setting method and communication apparatus
JP2007005897A (en) 2005-06-21 2007-01-11 Toshiba Corp Wireless communication apparatus, method and system
JP2008547311A (en) 2005-06-24 2008-12-25 ミツビシ・エレクトリック・リサーチ・ラボラトリーズ・インコーポレイテッド Method for finding a route in a wireless communication network
US7979368B2 (en) 2005-07-01 2011-07-12 Crossbeam Systems, Inc. Systems and methods for processing data flows
FI20055389A0 (en) 2005-07-05 2005-07-05 Nokia Corp Improved detection of invalid channel access requests
KR100769678B1 (en) 2005-07-05 2007-10-24 삼성전자주식회사 Frequency Synthesizer
US20070010237A1 (en) 2005-07-05 2007-01-11 Airgo Networks, Inc. Mac-level protection for networking extended-range and legacy devices in a wireless network
US8169980B2 (en) 2005-07-11 2012-05-01 Qualcomm Incorporated Methods and apparatuses for interworking
US7970017B2 (en) 2005-07-13 2011-06-28 At&T Intellectual Property I, L.P. Peer-to-peer synchronization of data between devices
US7564826B2 (en) 2005-07-13 2009-07-21 Texas Instruments Incorporated Apparatus for and method of synchronization and beaconing in a WLAN mesh network
US9184898B2 (en) 2005-08-01 2015-11-10 Google Technology Holdings LLC Channel quality indicator for time, frequency and spatial channel in terrestrial radio access network
US7599671B2 (en) 2005-08-08 2009-10-06 Marvell World Trade Ltd. Radar detection apparatus and method thereof
US7319849B2 (en) 2005-08-25 2008-01-15 Microtune (Texas), L.P. Radio-frequency tuner with differential converter
US7717342B2 (en) 2005-08-26 2010-05-18 Hand Held Products, Inc. Data collection device having dynamic access to multiple wireless networks
US8009644B2 (en) 2005-12-01 2011-08-30 Ruckus Wireless, Inc. On-demand services by wireless base station virtualization
JP4558639B2 (en) 2005-12-16 2010-10-06 富士通株式会社 Wireless LAN device and communication mode switching method
US7286009B2 (en) 2005-12-30 2007-10-23 D2Audio Corporation Digital PWM amplifier with simulation-based feedback
US7664085B2 (en) 2005-12-30 2010-02-16 Intel Corporation Wireless communication device and method for coordinating communications among wireless local area networks (WLANs) and broadband wireless access (BWA) networks
ITTO20060008A1 (en) 2006-01-05 2007-07-06 St Microelectronics Srl LOW VOLTAGE OPERATING MODULATOR DEVICE AND RELATED MODULATION PROCEDURE
KR100738557B1 (en) 2006-02-08 2007-07-11 삼성전자주식회사 Data frame transmission device and method in wireless local area network terminal
US7885398B2 (en) 2006-03-06 2011-02-08 Alcatel Lucent Multiple criteria based load balancing
US8170546B2 (en) 2006-03-22 2012-05-01 Broadcom Corporation Client device characterization of other client device transmissions and reporting of signal qualities to access point(s)
US7583625B2 (en) 2006-04-06 2009-09-01 Broadcom Corporation Access point multi-level transmission power and protocol control based on the exchange of characteristics
US20080056201A1 (en) 2006-03-22 2008-03-06 Broadcom Corporation, A California Corporation Interference parameter reporting from client devices to access point for use in modifying wireless operations
US7778226B2 (en) 2006-03-30 2010-08-17 Intel Corporation Device, system and method of coordination among multiple transceivers
JP4781880B2 (en) 2006-03-31 2011-09-28 富士通株式会社 Relay device, relay method, relay program, and communication system
US7711004B2 (en) 2006-04-18 2010-05-04 Cisco Technology, Inc. Multiple broadcast channels for wireless networks
US7535884B2 (en) 2006-04-18 2009-05-19 Cisco Technology, Inc. Battery-efficient generic advertising service for wireless mobile devices
US8464118B2 (en) 2006-05-02 2013-06-11 ANT—Advanced Network Technology Oy Method and system for wireless real-time transmission of multichannel audio or video data
US7483687B2 (en) 2006-05-11 2009-01-27 Frederic Carrez Quadrature sub-harmonic frequency down-converter
US7920885B2 (en) 2006-05-18 2011-04-05 Samsung Electronics Co., Ltd. Method and system for establishing a connection on a secondary frequency channel for wireless communication
US7844222B2 (en) 2006-05-24 2010-11-30 Broadcom Corporation Method and system for changing priority of slave frames in multiwire coexistence
US8442434B2 (en) 2006-05-24 2013-05-14 Broadcom Corporation Method and system for auto coexistence priority selection for a SCO link
WO2007138714A1 (en) * 2006-05-30 2007-12-06 Hitachi Communication Technologies, Ltd. Mobile communication system connection regulation method, base station device, and terminal device
US7801084B2 (en) 2006-06-09 2010-09-21 Intel Corporation Doppler frequency determination for mobile wireless devices
US7672645B2 (en) 2006-06-15 2010-03-02 Bitwave Semiconductor, Inc. Programmable transmitter architecture for non-constant and constant envelope modulation
US7864682B2 (en) 2006-06-27 2011-01-04 Samsung Electronics Co., Ltd. Method for routing data in networks
US7484136B2 (en) 2006-06-30 2009-01-27 Intel Corporation Signal-to-noise ratio (SNR) determination in the time domain
US8532023B2 (en) 2006-09-20 2013-09-10 Alcatel Lucent Interference aware routing in multi-radio wireless mesh networks
US20080080446A1 (en) 2006-09-28 2008-04-03 Mediatek Inc. Systems and methods for power management in a multiple input multiple output (mimo) wireless local area network (wlan)
US8077652B2 (en) 2006-10-03 2011-12-13 Viasat, Inc. MF-TDMA frequency hopping
US8159928B2 (en) 2006-10-03 2012-04-17 Qualcomm Incorporated Signal transmission in a wireless communication system
US8270302B2 (en) 2006-10-20 2012-09-18 Stmicroelectronics, Inc. System and method for providing an adaptive value of TTL (time to live) for broadcast/multicast messages in a mesh network using a hybrid wireless mesh protocol
MY154476A (en) 2006-10-23 2015-06-30 Interdigital Tech Corp Method and apparatus for sending and receiving channel quality indicators (cqis)
US7719373B2 (en) 2006-10-27 2010-05-18 Imec Device and method for generating a signal with predefined transcient at start-up
BRPI0718530A2 (en) 2006-11-08 2013-11-19 Ntt Docomo Inc MOBILE COMMUNICATION SYSTEM, BASE STATION, MOBILE STATION AND COMMUNICATION CONTROL METHOD
US8976670B2 (en) 2006-11-16 2015-03-10 Rockstar Consortium Us Lp System and method for delivering packet data over a multiplicity of communication links
US8654773B2 (en) 2006-11-30 2014-02-18 Conexant Systems, Inc. Systems and methods for coexistence of WLAN and bluetooth networks
US8050241B2 (en) 2006-11-30 2011-11-01 Research In Motion Limited Determining identifiers for wireless networks
US20080139212A1 (en) 2006-12-07 2008-06-12 Motorola, Inc. Apparatus and method for interoperation of various radio links with a piconet link in a wireless device
US7920883B2 (en) 2006-12-28 2011-04-05 Hewlett-Packard Development Company, L.P. Coordination of transmissions in wireless communications devices
US20080181154A1 (en) 2007-01-31 2008-07-31 Texas Instruments Incorporated Apparatus for and method of low power wireless local area network independent basic service set mode operation
US20080187003A1 (en) 2007-02-06 2008-08-07 Viasat, Inc. Piggyback requests in scheduled transmission
US8437792B2 (en) 2007-02-14 2013-05-07 Qualcomm Incorporated Uplink power control for LTE
US8073388B2 (en) 2007-02-28 2011-12-06 Broadcom Corporation Method and system for dynamically changing poll timing based on Bluetooth activity
US8493966B2 (en) 2007-03-13 2013-07-23 Marvell International Ltd. Optimized packet processing architecture for battery powered mobile communication device
US8170002B2 (en) 2007-05-31 2012-05-01 Conexant Systems, Inc. Systems and methods for indicating buffered data at an access point with efficient beacon handling
US20080232287A1 (en) 2007-03-21 2008-09-25 Samsung Electronics Co., Ltd. Method and system for power saving scheduling in wireless local area networks
US8406319B2 (en) 2007-03-27 2013-03-26 Motorola Mobility Llc Channel estimator with high noise suppression and low interpolation error for OFDM systems
US7679514B2 (en) 2007-03-30 2010-03-16 Broadcom Corporation Multi-mode RFID tag architecture
US8428002B2 (en) 2007-04-18 2013-04-23 Broadcom Corporation Cooperative transceiving between wireless interface devices of a host device
US20080261552A1 (en) 2007-04-19 2008-10-23 Mediatek Inc. Low voltage iq dual mixer
KR100877300B1 (en) 2007-05-02 2009-01-09 주식회사 티엘아이 VCO generating output signal with wide-range and fine-tuning and Variable delay circuit using therefor
US7801099B2 (en) 2007-05-10 2010-09-21 Broadcom Corporation Cooperative transceiving between wireless interface devices of a host device with acknowledge priority
US8412227B2 (en) 2007-05-18 2013-04-02 Qualcomm Incorporated Positioning using enhanced pilot signal
US7983216B2 (en) 2007-05-31 2011-07-19 Broadcom Corporation Coexistence management for cooperative transceiving in a shared spectrum
CN101316115B (en) 2007-05-31 2015-02-18 电信科学技术研究院 Detection method, equipment and system of pilot frequency sequence signal
WO2008150122A1 (en) 2007-06-08 2008-12-11 Lg Innotek Co., Ltd Wireless communication device
US20080320108A1 (en) 2007-06-20 2008-12-25 Microsoft Corporation Management Policies For Dense Wireless Access Point Infrastructures in Wireless Local Area Networks
US8045670B2 (en) 2007-06-22 2011-10-25 Texas Instruments Incorporated Interpolative all-digital phase locked loop
US8014329B2 (en) 2007-07-03 2011-09-06 Cisco Technology, Inc. Path selection and power management in mesh networks
US8149715B1 (en) 2007-07-17 2012-04-03 Marvell International Ltd. Mesh network operations
US8230100B2 (en) 2007-07-26 2012-07-24 Realnetworks, Inc. Variable fidelity media provision system and method
CN101373998B (en) 2007-08-20 2012-07-25 上海贝尔阿尔卡特股份有限公司 Low information interactive multi-base station collaboration MIMO as well as scheduling method and apparatus thereof
US8553561B1 (en) 2007-08-22 2013-10-08 Marvell International Ltd. Quality of service for mesh networks
US7725118B2 (en) 2007-08-22 2010-05-25 Intel Corporation Multi-radio wireless communication device and method for coordinating communications between potentially interfering radios
US8189506B2 (en) 2007-09-12 2012-05-29 Nokia Corporation Deep sleep mode for mesh points
US9686049B2 (en) 2007-09-12 2017-06-20 Avago Technologies General Ip (Singapore) Pte. Ltd Method and system for Bluetooth (BT) delayed acknowledgement (ACK)
US8577305B1 (en) 2007-09-21 2013-11-05 Marvell International Ltd. Circuits and methods for generating oscillating signals
US8139670B1 (en) 2007-09-21 2012-03-20 Marvell International Ltd. Modular MIMO transceiver architecture
US8046024B2 (en) 2007-10-30 2011-10-25 Intel Corporation Multi-radio platform with WiMax and bluetooth radio modules and method
US8121144B2 (en) 2007-11-20 2012-02-21 Altair Semiconductor Ltd. Multi-function wireless terminal
US8045922B2 (en) 2007-11-23 2011-10-25 Texas Instruments Incorporated Apparatus for and method of bluetooth and wireless local area network coexistence using a single antenna in a collocated device
US8345704B2 (en) 2007-12-05 2013-01-01 Broadcom Corporation Method and system for multi-radio coexistence and a collaborative interface
KR20090060951A (en) 2007-12-10 2009-06-15 한국전자통신연구원 Handshaking method, and transmission power determining method and apparatus thereof for parallel transmission of multiple streams in single radio channel
US8588705B1 (en) 2007-12-11 2013-11-19 Marvell International Ltd. System and method of determining Power over Ethernet impairment
US8126502B2 (en) 2007-12-31 2012-02-28 Intel Corporation Channel width switching in multiple OBSS systems
TWI348280B (en) 2008-01-21 2011-09-01 Univ Nat Taiwan Dual injection locked frequency dividing circuit
US8219142B2 (en) 2008-02-01 2012-07-10 Broadcom Corporation Method, system, and apparatus for coexistence of plurality of communication technologies in communication device
US8072913B2 (en) 2008-02-03 2011-12-06 Broadcom Corporation Collaborative coexistence of co-located mobile WiMAX, wireless LAN, and/or bluetooth radios
US8359373B2 (en) 2008-02-06 2013-01-22 Broadcom Corporation Handheld computing unit of a computing device with an extended computing unit
WO2009101567A1 (en) 2008-02-12 2009-08-20 Nxp B.V. Wireless communications arrangement, network and approach therefor to manage a shared channel among different wireless systems
US8619732B2 (en) 2008-02-28 2013-12-31 Broadcom Corporation Method and apparatus for enabling coexistence of plurality of communication technologies on communication device
US8345607B2 (en) 2008-03-10 2013-01-01 Marvell World Trade Ltd. Coexistence and collocation of remote network and local network radios
US20090321056A1 (en) 2008-03-11 2009-12-31 Tessera, Inc. Multi-stage electrohydrodynamic fluid accelerator apparatus
US8155039B2 (en) 2008-03-17 2012-04-10 Wi-Lan, Inc. System and apparatus for cascading and redistributing HDTV signals
CN101978610B (en) 2008-03-18 2014-03-12 马维尔国际贸易有限公司 Bluetooth and WLAN coexistence architecture having shared low noise amplifier
US8694044B2 (en) 2008-03-25 2014-04-08 Telefonaktiebolaget L M Ericsson (Publ) Dynamic power control of user equipment
US20090247217A1 (en) 2008-03-27 2009-10-01 Mediatek Inc. Apparatus and method for wireless communications capable of bluetooth, wireless local area network (wlan) and wimax communications
US20090245133A1 (en) 2008-03-31 2009-10-01 Intel Corporation Broadcast/multicast based network discovery
US7924795B2 (en) 2008-03-31 2011-04-12 Mediatek Inc. Apparatus and method for coordinating bluetooth and wireless local area network (WLAN) and WiMAX communications
EP2110946A1 (en) 2008-04-18 2009-10-21 STMicroelectronics (Grenoble) SAS Differential RF amplifier
US8111677B2 (en) 2008-04-24 2012-02-07 Conexant Systems, Inc. Systems and methods of combined bluetooth and WLAN signaling
US20090268652A1 (en) 2008-04-29 2009-10-29 Nokia Corporation Power management mode aware mesh beacon collision avoidance and information update mechanism
US9065574B2 (en) 2008-04-30 2015-06-23 Intel Mobile Communications GmbH Frequency tracking for a FMR transmitter
US8085737B2 (en) 2008-05-06 2011-12-27 Intel Corporation Multi-transceiver mobile communication device and methods for negative scheduling
US8274894B2 (en) 2008-05-07 2012-09-25 Nokia Corporation Quality of service and power aware forwarding rules for mesh points in wireless mesh networks
KR20090117537A (en) 2008-05-09 2009-11-12 삼성전기주식회사 High order harmonic rejection filter using current steering technique
US20090285264A1 (en) 2008-05-13 2009-11-19 Carlos Aldana Method and System for Detection of Long Pulse Bin 5 Radars in the Presence of Greenfield Packets
US9071498B2 (en) 2008-05-15 2015-06-30 Telsima Corporation Systems and methods for fractional routing redundancy
US8280387B2 (en) 2008-05-22 2012-10-02 Ntt Docomo, Inc. Femtocell channel assignment and power control for improved femtocell coverage and efficient cell search
US8310967B1 (en) 2008-06-19 2012-11-13 Marvell International Ltd. Infrastructure and ad-hoc node device
US8249511B2 (en) 2008-06-25 2012-08-21 Samsung Electronics Co., Ltd. Downlink wireless transmission schemes with inter-cell interference mitigation
US8600324B1 (en) 2008-06-27 2013-12-03 Marvell International Ltd Circuit and method for adjusting a digitally controlled oscillator
US8468374B2 (en) 2008-07-11 2013-06-18 Marvell World Trade Ltd. Access point rotation for sharing power load
US8078111B2 (en) 2008-07-29 2011-12-13 Qualcomm Incorporated Methods and apparatus for using multiple frequency bands for communication
US8155695B2 (en) 2008-07-29 2012-04-10 Sony Ericsson Mobile Communications Ab Apparatus and method to improve WLAN performance in a dual WLAN modality environment
GB0814483D0 (en) 2008-08-07 2008-09-10 Cambridge Silicon Radio Ltd Uwb coexistence scheme
US8076977B2 (en) 2008-08-29 2011-12-13 Infineon Technologies Ag Device having digitally controlled oscillator
KR101481586B1 (en) 2008-09-04 2015-01-12 엘지전자 주식회사 Method for communcation time allocation of multiple radio
US20100069112A1 (en) 2008-09-15 2010-03-18 Texas Instruments Incorporated Scheduling transmissions in coexisting wireless networks
US8254493B2 (en) 2008-09-30 2012-08-28 Intel Mobile Communications GmbH High bandwidth modulation and transmission
US8274885B2 (en) 2008-10-03 2012-09-25 Wi-Lan, Inc. System and method for data distribution in VHF/UHF bands
US8699430B2 (en) 2008-10-10 2014-04-15 The Trustees Of The Stevens Institute Of Technology Method and apparatus for dynamic spectrum access
US20100130129A1 (en) 2008-11-25 2010-05-27 Jue Chang WLAN and bluetooth harmonization
CN102017532A (en) 2008-12-01 2011-04-13 马维尔国际贸易有限公司 Access point enhancements
US8081038B2 (en) 2008-12-22 2011-12-20 Electronics And Telecommunications Research Institute Ring oscillator having wide frequency range
US8203985B2 (en) 2008-12-31 2012-06-19 Intel Corporation Power saving in peer-to-peer communication devices
CN101483909B (en) 2009-02-06 2011-03-02 中兴通讯股份有限公司 Reverse power control method based on multi-carrier
US8189526B2 (en) 2009-03-06 2012-05-29 Samsung Electronics Co., Ltd. Method and system for shared communication medium in wireless communication systems
US8254296B1 (en) 2009-03-19 2012-08-28 Marvell International Ltd. Peer-to-peer frequency band negotiation
US8472427B1 (en) 2009-04-06 2013-06-25 Marvell International Ltd. Packet exchange arbitration for coexisting radios
KR101579464B1 (en) 2009-04-16 2016-01-04 엘지전자 주식회사 Method For Processing Traffic Using Unused Band In An Intermediate Access Point
US8229041B2 (en) 2009-05-26 2012-07-24 Broadcom Corporation Direct detection of wireless interferers in a communication device for multiple modulation types
US20120327779A1 (en) 2009-06-12 2012-12-27 Cygnus Broadband, Inc. Systems and methods for congestion detection for use in prioritizing and scheduling packets in a communication network
US8594056B2 (en) 2009-06-16 2013-11-26 Qualcomm Incorporated Method and apparatus for dynamic and dual antenna bluetooth (BT)/WLAN coexistence
US8768323B2 (en) 2009-06-23 2014-07-01 Intel Corporation Service discovery in a wireless network
US9130605B2 (en) 2009-07-09 2015-09-08 Mediatek Inc. Systems and methods for coexistence between plurality of wireless communications modules sharing single antenna
US9025583B2 (en) 2009-07-09 2015-05-05 Mediatek Inc. System for the coexistence between a plurality of wireless communication module sharing single antenna
CN102024160A (en) 2009-09-14 2011-04-20 西门子公司 Method and apparatus satisfying frequency spectrum template in radio frequency identification system
US8233928B2 (en) 2009-09-29 2012-07-31 Spectrum Bridge, Inc. System and method for managing spectrum allocation
US8626067B2 (en) 2009-10-26 2014-01-07 Mediatek Inc. System and methods for enhancing coexistence efficiency for multi-radio terminals
US9900759B2 (en) 2009-11-04 2018-02-20 Qualcomm Incorporated Method and apparatus for peer discovery in a wireless communication network
US8340034B1 (en) 2009-11-11 2012-12-25 Marvell International Ltd. Bluetooth and wireless LAN arbitration
ES2696231T3 (en) 2009-11-13 2019-01-14 Interdigital Patent Holdings Inc Method and apparatus to support management actions for very high performance in wireless communications
US8335937B2 (en) 2009-12-24 2012-12-18 Intel Corporation Method and system for discoverability of power saving P2P devices
US8493992B2 (en) 2010-02-04 2013-07-23 Texas Instruments Incorporated Interrelated WiFi and USB protocols and other application framework processes, circuits and systems
JP5611372B2 (en) 2010-02-12 2014-10-22 インターデイジタル パテント ホールディングス インコーポレイテッド Method and apparatus for optimizing uplink random access channel transmission
US8451776B2 (en) 2010-03-31 2013-05-28 Qualcomm Incorporated Method and apparatus to facilitate support for multi-radio coexistence
CN102907139B (en) 2010-04-02 2016-10-12 交互数字专利控股公司 Group's process for equipment for machine type communication
WO2011157235A1 (en) 2010-06-18 2011-12-22 Mediatek Inc. System and method for coordinating multiple radio transceivers within the same device platform
US20120025921A1 (en) 2010-07-31 2012-02-02 Quintic Holdings Low Noise VCO Circuit Having Low Noise Bias
KR101928448B1 (en) 2010-10-11 2018-12-13 삼성전자주식회사 Method and appratus for avoiding inteference from in-device communication module using time division multiplexing in wireless communication system
US8817662B2 (en) 2010-10-20 2014-08-26 Marvell World Trade Ltd. Pre-association discovery
FR2967802B1 (en) 2010-11-22 2012-11-23 Inside Contactless GSM RADIO COMMUNICATION DEVICE COMPRISING A UHF LABEL READER
US8767616B2 (en) 2010-12-07 2014-07-01 Marvell International Ltd. Synchronized interference mitigation scheme for heterogeneous wireless networks
US8537798B2 (en) 2010-12-31 2013-09-17 Qualcomm Incorporated Coexistence mechanism for collocated WLAN and WWAN communication devices
US8537799B2 (en) 2010-12-31 2013-09-17 Qualcomm Incorporated Coexistence mechanism for collocated WLAN and WWAN communication devices
KR101967413B1 (en) 2011-02-08 2019-04-10 마벨 월드 트레이드 리미티드 Wlan channel allocation in unused tv frequency
US8805303B2 (en) 2011-02-18 2014-08-12 Blackberry Limited Method and apparatus for avoiding in-device coexistence interference with preferred frequency notification
US9204398B2 (en) 2011-03-21 2015-12-01 Nokia Technologies Oy Method and apparatus for battery with secure element
WO2012149425A1 (en) 2011-04-29 2012-11-01 Marvell World Trade Ltd. Multi-technology coexistence for ibss networks
US8655278B2 (en) 2011-06-20 2014-02-18 Hewlett-Packard Development Company, L.P. Band steering
US9036517B2 (en) 2012-01-09 2015-05-19 Marvell World Trade Ltd. Methods and apparatus for establishing a tunneled direct link setup (TDLS) session between devices in a wireless network
US9215708B2 (en) 2012-02-07 2015-12-15 Marvell World Trade Ltd. Method and apparatus for multi-network communication
US20130225068A1 (en) 2012-02-24 2013-08-29 Nokia Corporation Method, apparatus, and computer program product for coexistence-aware communication mechanism for multi-radios
US9681382B2 (en) 2012-05-11 2017-06-13 Intel Corporation Radio coexistence in wireless networks
US9450649B2 (en) 2012-07-02 2016-09-20 Marvell World Trade Ltd. Shaping near-field transmission signals
US8971182B2 (en) 2012-08-07 2015-03-03 Lg Electronics Inc. Method for data traffic offloading and apparatus using the same
KR101604202B1 (en) 2012-09-26 2016-03-16 애플 인크. Transmission power modulation to facilitate in-device coexistence between wireless communication technologies
US20140126552A1 (en) 2012-11-02 2014-05-08 Qualcomm Incorporated Autonomous denial configurations for multi-radio coexistence

Patent Citations (78)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4805215A (en) 1986-10-01 1989-02-14 Racal Data Communications Inc. Adaptive echo canceller with sparse dynamically positioned taps
US5708656A (en) * 1996-09-11 1998-01-13 Nokia Mobile Phones Limited Method and apparatus for packet data transmission
US6347091B1 (en) * 1998-06-19 2002-02-12 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for dynamically adapting a connection state in a mobile communications system
US6553229B1 (en) 1998-11-24 2003-04-22 Ericsson Inc. Signal scanning systems and methods for multiple-mode cellular radiotelephones
US6366622B1 (en) 1998-12-18 2002-04-02 Silicon Wave, Inc. Apparatus and method for wireless communications
US20060063509A1 (en) 1999-01-12 2006-03-23 David Pincu System for providing power over Ethernet through a patch panel
US6640308B1 (en) 1999-04-16 2003-10-28 Invensys Systems, Inc. System and method of powering and communicating field ethernet device for an instrumentation and control using a single pair of powered ethernet wire
US6946950B1 (en) 1999-07-12 2005-09-20 Matsushita Electric Industrial Co., Ltd. Mobile body discrimination apparatus for rapidly acquiring respective data sets transmitted through modulation of reflected radio waves by transponders which are within a communication region of an interrogator apparatus
US6954708B2 (en) 1999-08-11 2005-10-11 Broadcom Corporation System and method for detecting a device requiring power
US6675328B1 (en) 1999-10-08 2004-01-06 Vigilant Networks, Llc System and method to determine data throughput in a communication network
US6519461B1 (en) * 1999-10-29 2003-02-11 Telefonaktiebolaget Lm Ericsson (Publ) Channel-type switching from a common channel to a dedicated channel based on common channel load
US6374117B1 (en) * 1999-12-22 2002-04-16 Telefonaktiebolaget Lm Ericsson (Publ) Queue based power control scheduling
WO2001078252A1 (en) 2000-04-07 2001-10-18 Koninklijke Philips Electronics N.V. Radio communication system and method of controlling downlink transmission power or bit rate
US20060189359A1 (en) 2000-09-28 2006-08-24 David Kammer Power-conserving intuitive device discovery technique in a Bluetooth environment
US6934566B2 (en) 2000-12-21 2005-08-23 Samsung Electronics Co., Ltd Wireless communication device and controlling method thereof
US20080076466A1 (en) * 2001-04-09 2008-03-27 Peter Larsson Instantaneous joint transmit power control and link adaptation for RTS/CTS based channel access
WO2002082751A2 (en) 2001-04-09 2002-10-17 Telefonaktiebolaget Lm Ericsson (Publ) Instantaneous joint transmit power control and link adaptation for rts/cts based channel access
WO2002091623A1 (en) 2001-05-10 2002-11-14 Koninklijke Philips Electronics N.V. Updating path loss estimation for power control and link adaption in ieee 802.11h wlan
US7206840B2 (en) * 2001-05-11 2007-04-17 Koninklike Philips Electronics N.V. Dynamic frequency selection scheme for IEEE 802.11 WLANs
US20090202013A1 (en) 2001-06-28 2009-08-13 Sebastian Peroor K Wireless communication network and method for extended-range uplink communications
US7079811B2 (en) 2001-08-15 2006-07-18 Qualcomm, Incorporated Dual mode bluetooth/wireless device with power conservation features
US7995544B2 (en) * 2001-11-02 2011-08-09 At&T Intellectual Property Ii, L.P. Wireless LANs and neighborhood capture
US20110164538A1 (en) 2002-03-11 2011-07-07 Adaptix, Inc. Spectrum Allocation System and Method for Multi-Band Wireless RF Data Communications
US7936714B1 (en) 2002-03-11 2011-05-03 Netgear, Inc. Spectrum allocation system and method for multi-band wireless RF data communications
US20030198200A1 (en) 2002-04-22 2003-10-23 Cognio, Inc. System and Method for Spectrum Management of a Shared Frequency Band
US7403018B1 (en) 2002-06-07 2008-07-22 Marvell International Ltd. Cable tester
US7173431B1 (en) 2002-06-07 2007-02-06 Marvell International Ltd. Cable tester
US20040063403A1 (en) 2002-09-30 2004-04-01 Durrant Randolph L. Methods for identification of IEEE 802.11b radio signals
US20040110470A1 (en) * 2002-12-09 2004-06-10 Tsien Chih C. Method and apparatus to control transmitter
US20040214575A1 (en) 2003-04-22 2004-10-28 Vladan Jovanovic Method of handoff at the border between CDMA underlay and overlay systems
US20050058151A1 (en) 2003-06-30 2005-03-17 Chihsiang Yeh Method of interference management for interference/collision avoidance and spatial reuse enhancement
US7257095B2 (en) 2003-07-30 2007-08-14 Texas Instruments Incorporated Power saving via physical layer address filtering in WLANs
US20080027033A1 (en) 2003-11-19 2008-01-31 Acrux Dds Pty Ltd Method and Composition for Treatment of Cutaneous Lesions
US20050120119A1 (en) 2003-12-01 2005-06-02 Microsoft Corporation Smart scan for bluetooth pan devices
US7377441B2 (en) 2004-03-05 2008-05-27 Microvision, Inc. Electronic device with auxiliary interfaces
US20060239443A1 (en) 2004-10-15 2006-10-26 Oxford William V Videoconferencing echo cancellers
US7659003B2 (en) 2004-10-28 2010-02-09 Shin-Etsu Chemical Co., Ltd. Silicone composition and a pressure sensitive adhesive film having a pressure sensitive adhesive layer made from the composition
US20060128308A1 (en) 2004-12-10 2006-06-15 Texas Instruments Incorporated Low power bluetooth page and inquiry scan
US20100216497A1 (en) 2005-02-18 2010-08-26 Fujitsu Limited Base station and interference reduction method in base station
US20060281404A1 (en) 2005-06-13 2006-12-14 Samsung Electronics Co., Ltd Relay system and method for cellular communication
JP2007028568A (en) 2005-06-14 2007-02-01 Ntt Docomo Inc Base station, mobile station, and power control method
US8000715B2 (en) 2005-08-04 2011-08-16 Stmicroelectronics S.R.L. Method and system for dynamic spectrum allocation, and computer program product therefor
US20070081553A1 (en) 2005-10-12 2007-04-12 Finisar Corporation Network tap device powered by power over ethernet
US20070103829A1 (en) 2005-11-10 2007-05-10 Powerdsine, Ltd. Enhanced Classification for Power Over Ethernet
US20090005061A1 (en) 2005-12-30 2009-01-01 Trueposition, Inc. Location quality of service indicator
US7849333B2 (en) 2006-05-08 2010-12-07 Cisco Technology, Inc. Inline power allocation for power over Ethernet applications
US20100097952A1 (en) 2006-05-12 2010-04-22 Shared Spectrum Company Method and System for Classifying Communication Signals in a Dynamic Spectrum Access System
US20070280471A1 (en) 2006-06-02 2007-12-06 Broadcom Corporation Minimizing saturation caused by power transfer in a communication system transformer
US20090168686A1 (en) 2006-08-31 2009-07-02 Motorola, Inc. Adaptive Broadcast Multicast Systems in Wireless Communication Networks
US20080129118A1 (en) 2006-11-30 2008-06-05 Broadcom Corporation System and method for controlling power delivered to a powered device based on channel impediments
US7876786B2 (en) 2006-12-01 2011-01-25 Microsoft Corporation Dynamic time-spectrum block allocation for cognitive radio networks
US7355416B1 (en) 2007-01-07 2008-04-08 Microsemi Corp.- Analog Mixed Signal Group Ltd. Measurement of cable quality by power over ethernet
US20100103867A1 (en) 2007-01-09 2010-04-29 Ntt Docomo, Inc. Base station apparatus, user equipment, and method used in mobile communication system
US20100248734A1 (en) 2007-03-29 2010-09-30 Kyocera Corporation Communication Control Method, Communication System and Communication Control Apparatus
US7826411B2 (en) 2007-05-10 2010-11-02 Broadcom Corporation Cooperative transceiving between wireless interface devices of a host device with shared modules
US7881746B2 (en) 2007-05-10 2011-02-01 Broadcom Corporation Shared processing between wireless interface devices of a host device
US20080310067A1 (en) 2007-06-12 2008-12-18 Broadcom Corporation System and method for using a phy to locate a thermal signature in a cable plant for diagnostic, enhanced, and higher power applications
US8369782B1 (en) 2007-08-13 2013-02-05 Marvell International Ltd. Bluetooth wideband scan mode
US8275314B1 (en) 2007-08-13 2012-09-25 Marvell International Ltd. Bluetooth scan modes
US20090168725A1 (en) 2007-12-26 2009-07-02 Qualcomm Incorporated Communication handover management
US20090170497A1 (en) 2007-12-28 2009-07-02 Guowang Miao Probabilistic interference mitigation for wireless cellular networks
US20090190541A1 (en) 2008-01-28 2009-07-30 Saied Abedi Communication systems
US8060017B2 (en) 2008-04-04 2011-11-15 Powerwave Cognition, Inc. Methods and systems for a mobile, broadband, routable internet
US20090291640A1 (en) 2008-05-22 2009-11-26 Qualcomm Incorporated System and method to enable resource partitioning in wireless networks
US20090311961A1 (en) 2008-06-16 2009-12-17 Raja Banerjea Short-Range Wireless Communication
US8315564B2 (en) 2008-06-16 2012-11-20 Marvell World Trade Ltd. Short-range wireless communication
US20130045687A1 (en) 2008-06-16 2013-02-21 Marvell World Trade Ltd. Short-Range Wireless Communication
CN102067689A (en) 2008-06-16 2011-05-18 马维尔国际贸易有限公司 Short-range wireless communication
US20090312027A1 (en) 2008-06-17 2009-12-17 Foschini G J Method for adaptive formation of cell clusters for cellular wireless networks with coordinated transmission and reception
US20100009675A1 (en) 2008-07-14 2010-01-14 Nokia Corporation Setup of device-to-device connection
US8472968B1 (en) 2008-08-11 2013-06-25 Marvell International Ltd. Location-based detection of interference in cellular communications systems
US8150328B2 (en) 2008-09-17 2012-04-03 Motorola Solutions, Inc. Method and apparatus for distributed sensing management and control within a cognitive radio network
US20100082957A1 (en) 2008-10-01 2010-04-01 Fujitsu Limited Information processing device
US8107391B2 (en) 2008-11-19 2012-01-31 Wi-Lan, Inc. Systems and etiquette for home gateways using white space
US8532041B1 (en) 2009-04-24 2013-09-10 Marvell International Ltd. Method for transmitting information in a regulated spectrum and network configured to operate in the regulated spectrum
US8204015B2 (en) 2009-05-29 2012-06-19 Motorola Solutions, Inc. Method and apparatus for zone controller based dynamic spectrum allocation
US20100303026A1 (en) 2009-05-29 2010-12-02 Motorola, Inc. Method and apparatus for zone controller based dynamic spectrum allocation
US8364188B2 (en) 2010-06-04 2013-01-29 Alcatel Lucent Method and controller for allocating whitespace spectrum

Non-Patent Citations (40)

* Cited by examiner, † Cited by third party
Title
"Advisory Action", U.S. Appl. No. 12/190,251, Dec. 7, 2011, 3 pages.
"Final Office Action", U.S. Appl. No. 12/190,251, Sep. 13, 2011, 15 pages.
"Final Office Action", U.S. Appl. No. 12/323,292, Aug. 24, 2012, 26 pages.
"Final Office Action", U.S. Appl. No. 12/534,361, Feb. 29, 2012, 13 pages.
"Final Office Action", U.S. Appl. No. 12/759,336, Feb. 25, 2013, 11 pages.
"Foreign Notice of Allowance", Japanese Application No. 2011-513586, Jul. 16, 2013, 2 pages.
"Foreign Office Action", Chinese Application No. 200980122587.0, Feb. 21, 2013, 17 pages.
"Foreign Office Action", EP Application No. 09789754.0, May 17, 2011, 8 pages.
"Foreign Office Action", European Patent Application No. 09789754.0, Jul. 12, 2012, 4 pages.
"Foreign Office Action", European Patent Application No. 09789754.0, Mar. 11, 2013, 4 Pages.
"Foreign Office Action", Japanese Application No. 2011-513586, Apr. 9, 2013, 4 Pages.
"Foreign Office Action", Japanese Application No. 2011-513586, Oct. 23, 2012, 7 pages.
"Information Technology-Telecommunications and Information Exchange Between systems-Local and Metropolitan Area Networks-Specific Requirements", IEEE Standard, Aug. 1, 2005, pp. 1-60.
"Information Technology-Telecommunications and Information Exchange between Systems-Local and Metropolitan Area Networks-Specific Requirements", Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications, IEEE Standard 802.11h-2003 (Amendment to IEEE Std 802.11-1993), Oct. 14, 2003, 80 pages.
"Non-Final Office Action", U.S. Appl. No. 12/190,240, Jan. 6, 2012, 7 pages.
"Non-Final Office Action", U.S. Appl. No. 12/190,251, Mar. 29, 2011, 8 pages.
"Non-Final Office Action", U.S. Appl. No. 12/190,251, Mar. 29, 2012, 11 pages.
"Non-Final Office Action", U.S. Appl. No. 12/323,292, Dec. 21, 2011, 17 pages.
"Non-Final Office Action", U.S. Appl. No. 12/478,446, Dec. 28, 2011, 17 pages.
"Non-Final Office Action", U.S. Appl. No. 12/534,361, Oct. 12, 2011, 11 pages.
"Non-Final Office Action", U.S. Appl. No. 12/759,336, Oct. 4, 2012, 13 pages.
"Non-Final Office Action", U.S. Appl. No. 13/604,563, Apr. 5, 2013, 6 pages.
"Non-Final Office Action", U.S. Appl. No. 13/656,482, Mar. 19, 2013, 19 pages.
"Notice of Allowance", U.S. Appl. No. 12/190,240, May 16, 2012, 4 pages.
"Notice of Allowance", U.S. Appl. No. 12/190,251, Oct. 4, 2012, 6 pages.
"Notice of Allowance", U.S. Appl. No. 12/323,292, Jun. 28, 2013, 8 pages.
"Notice of Allowance", U.S. Appl. No. 12/478,446, Jun. 14, 2012, 6 pages.
"Notice of Allowance", U.S. Appl. No. 12/534,361, Feb. 14, 2013, 12 pages.
"Notice of Allowance", U.S. Appl. No. 12/759,336, May 3, 2013, 9 pages.
"Notice of Allowance", U.S. Appl. No. 13/656,482, Sep. 3, 2013, 8 pages.
"Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications", Information technology-Telecommunications and information exchange between systems-Local and metropolitan area networks-Specific requirements-,IEEE, Apr. 2003, pp. 1-69.
"PCT Search Report", Application No. PCT/US2009/046289, Oct. 29, 2009, 13 pages.
"Search Report", European Application No. 13169350.9, Aug. 13, 2013, 10 Pages.
"Supplemental Notice of Allowance", U.S. Appl. No. 12/759,336, Aug. 14, 2013, 2 pages.
"Supplemental Notice of Allowance", U.S. Appl. No. 12/759,336, Jun. 18, 2013, 2 pages.
"Supplemental Notice of Allowance", U.S. Appl. No. 12/759,336, Jun. 5, 2013, 2 pages.
Eun-Sun, et al.,"A Power Control MAC Protocol for Ad Hoc Networks", Wireless Networks; The Journal of Mobile Communication, Computation, and Information, vol. 11, No. 1-2,Kluwer Academic Publishers, Jan. 1, 2005, pp. 55-66.
Jung, et al.,"A Power Control MAC Protocol for Ad Hoc Networks", Wireless Networks ; The Journal of Mobile Communication, Computation and Information, Kluwer Academic Publishers vol. 11, No. 1-2, Jan. 1, 2005, 12 Pages.
Qiao, et al.,"Interference Analysis and Transmit Power Control in IEEE 802.11a/h Wireless LANs", IEEE/ACM Transactions on Networking, IEEE/ACM, New York, NY, US, vol. 15. No. 5, Oct. 1, 2007, 14 Pages.
Tinnirello et al.,"Revisit of RTS/CTS Exchange in High-Speed IEEE 802.11 Networks", World of Wireless Mobile and Multimedia Networks. 2005. Wowmom 2005. Sixth IEEE International Symposium on a Taormina-Giardini Naxos, Italy Jun. 13-16, 2005 Piscataway, NJ, USA, IEEE, Los Alamitos, CA, USA, Jun. 13, 2005, 10 Pages.

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8649734B1 (en) 2007-08-13 2014-02-11 Marvell International Ltd. Bluetooth scan modes
US8897706B1 (en) 2007-08-13 2014-11-25 Marvell International Ltd. Bluetooth wideband scan mode
US9401737B1 (en) 2007-09-21 2016-07-26 Marvell International Ltd. Circuits and methods for generating oscillating signals
US9148200B1 (en) 2007-12-11 2015-09-29 Marvell International Ltd. Determining power over ethernet impairment
US8989669B2 (en) 2008-06-16 2015-03-24 Marvell World Trade Ltd. Short-range wireless communication
US8655279B2 (en) 2008-06-16 2014-02-18 Marvell World Trade Ltd. Short-range wireless communication
US8923788B1 (en) 2008-06-27 2014-12-30 Marvell International Ltd. Circuit and method for adjusting a digitally controlled oscillator
US9055460B1 (en) 2008-08-11 2015-06-09 Marvell International Ltd. Location-based detection of interference in cellular communications systems
US9655041B1 (en) 2008-12-31 2017-05-16 Marvell International Ltd. Discovery-phase power conservation
US9131520B1 (en) 2009-04-06 2015-09-08 Marvell International Ltd. Packet exchange arbitration for coexisting radios
US8982826B1 (en) 2009-04-24 2015-03-17 Marvell International Ltd. Method for transmitting information in a regulated spectrum and network configured to operate in the regulated spectrum
US20120071188A1 (en) * 2009-06-03 2012-03-22 Huawei Technologies Co., Ltd. Dynamic spectrum allocation method and device
US8626220B2 (en) * 2009-06-03 2014-01-07 Huawei Technologies Co., Ltd. Dynamic spectrum allocation method and device
US9066369B1 (en) 2009-09-16 2015-06-23 Marvell International Ltd. Coexisting radio communication
US9294997B1 (en) 2010-05-11 2016-03-22 Marvell International Ltd. Wakeup beacons for mesh networks
US9332488B2 (en) 2010-10-20 2016-05-03 Marvell World Trade Ltd. Pre-association discovery
US9078108B1 (en) 2011-05-26 2015-07-07 Marvell International Ltd. Method and apparatus for off-channel invitation
US8983557B1 (en) 2011-06-30 2015-03-17 Marvell International Ltd. Reducing power consumption of a multi-antenna transceiver
US9125216B1 (en) 2011-09-28 2015-09-01 Marvell International Ltd. Method and apparatus for avoiding interference among multiple radios
US9215708B2 (en) 2012-02-07 2015-12-15 Marvell World Trade Ltd. Method and apparatus for multi-network communication
US9450649B2 (en) 2012-07-02 2016-09-20 Marvell World Trade Ltd. Shaping near-field transmission signals

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